402624025 has 6 divisors (see below), whose sum is σ = 499253822. Its totient is φ = 322099200.

The previous prime is 402624017. The next prime is 402624029. The reversal of 402624025 is 520426204.

It can be written as a sum of positive squares in 3 ways, for example, as 3583449 + 399040576 = 1893^2 + 19976^2 .

It is not a de Polignac number, because 402624025 - 2³ = 402624017 is a prime.

It is a super-2 number, since 2×402624025² = 324212211014401250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 16104961 = 402624025 / (4 + 0 + 2 + 6 + 2 + 4 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402624029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8052456 + ... + 8052505.

Almost surely, 2^402624025 is an apocalyptic number.

It is an amenable number.

402624025 is a deficient number, since it is larger than the sum of its proper divisors (96629797).

402624025 is a wasteful number, since it uses less digits than its factorization.

402624025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16104971 (or 16104966 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 402624025 is about 20065.4933903954. The cubic root of 402624025 is about 738.4139545230.

The spelling of 402624025 in words is "four hundred two million, six hundred twenty-four thousand, twenty-five".