402504025 has 48 divisors (see below), whose sum is σ = 649387008. Its totient is φ = 239976000.

The previous prime is 402504023. The next prime is 402504059. The reversal of 402504025 is 520405204.

It is not a de Polignac number, because 402504025 - 2¹ = 402504023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402503987 and 402504005.

It is not an unprimeable number, because it can be changed into a prime (402504023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39730 + ... + 48820.

It is an arithmetic number, because the mean of its divisors is an integer number (13528896).

Almost surely, 2^402504025 is an apocalyptic number.

It is an amenable number.

402504025 is a deficient number, since it is larger than the sum of its proper divisors (246882983).

402504025 is a wasteful number, since it uses less digits than its factorization.

402504025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9142 (or 9137 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 402504025 is about 20062.5029595013. The cubic root of 402504025 is about 738.3405870853.

Adding to 402504025 its reverse (520405204), we get a palindrome (922909229).

The spelling of 402504025 in words is "four hundred two million, five hundred four thousand, twenty-five".