745220 has 24 divisors (see below), whose sum is σ = 1788864. Its totient is φ = 255456.

The previous prime is 745201. The next prime is 745231. The reversal of 745220 is 22547.

745220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 745192 and 745201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2522 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (74536).

2⁷⁴⁵²²⁰ is an apocalyptic number.

745220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

745220 is an abundant number, since it is smaller than the sum of its proper divisors (1043644).

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

745220 is a wasteful number, since it uses less digits than its factorization.

745220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339 (or 5337 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 745220 is about 863.2612582527. The cubic root of 745220 is about 90.6625995388.

Adding to 745220 its reverse (22547), we get a palindrome (767767).

The spelling of 745220 in words is "seven hundred forty-five thousand, two hundred twenty".