1020520 has 32 divisors (see below), whose sum is σ = 2373120. Its totient is φ = 394560.

The previous prime is 1020517. The next prime is 1020529. The reversal of 1020520 is 250201.

1020520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1020520² = 2082922140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1020497 and 1020506.

It is not an unprimeable number, because it can be changed into a prime (1020529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (74160).

2^1020520 is an apocalyptic number.

1020520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186560).

1020520 is an abundant number, since it is smaller than the sum of its proper divisors (1352600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020520 is a wasteful number, since it uses less digits than its factorization.

1020520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1020520 is about 1010.2078993950. The cubic root of 1020520 is about 100.6793740568.

Adding to 1020520 its reverse (250201), we get a palindrome (1270721).

It can be divided in two parts, 1020 and 520, that added together give a triangular number (1540 = T₅₅).

The spelling of 1020520 in words is "one million, twenty thousand, five hundred twenty".