64004025 has 12 divisors (see below), whose sum is σ = 105820112. Its totient is φ = 34135440.

The previous prime is 64004023. The next prime is 64004047. The reversal of 64004025 is 52040046.

It is a happy number.

It is not a de Polignac number, because 64004025 - 2¹ = 64004023 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64003992 and 64004010.

It is not an unprimeable number, because it can be changed into a prime (64004021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426619 + ... + 426768.

Almost surely, 2^64004025 is an apocalyptic number.

It is an amenable number.

64004025 is a deficient number, since it is larger than the sum of its proper divisors (41816087).

64004025 is a wasteful number, since it uses less digits than its factorization.

64004025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853400 (or 853395 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 64004025 is about 8000.2515585449. The cubic root of 64004025 is about 400.0083852409.

The spelling of 64004025 in words is "sixty-four million, four thousand, twenty-five".