1020200 has 24 divisors (see below), whose sum is σ = 2372430. Its totient is φ = 408000.

The previous prime is 1020163. The next prime is 1020223. The reversal of 1020200 is 20201.

It can be written as a sum of positive squares in 3 ways, for example, as 376996 + 643204 = 614^2 + 802^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2351 + ... + 2750.

2^1020200 is an apocalyptic number.

1020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020200 is an abundant number, since it is smaller than the sum of its proper divisors (1352230).

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

1020200 is a wasteful number, since it uses less digits than its factorization.

1020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117 (or 5108 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 1020200 is about 1010.0495037373. The cubic root of 1020200 is about 100.6688497594.

Adding to 1020200 its reverse (20201), we get a palindrome (1040401).

Subtracting from 1020200 its reverse (20201), we obtain a palindrome (999999).

The spelling of 1020200 in words is "one million, twenty thousand, two hundred".