25217964 has 18 divisors (see below), whose sum is σ = 63745500. Its totient is φ = 8405976.

The previous prime is 25217947. The next prime is 25217981. The reversal of 25217964 is 46971252.

25217964 is a `hidden beast` number, since 2 + 521 + 79 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (25217947) and next prime (25217981).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 700499 = 25217964 / (2 + 5 + 2 + 1 + 7 + 9 + 6 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 350214 + ... + 350285.

Almost surely, 2^25217964 is an apocalyptic number.

It is an amenable number.

25217964 is an abundant number, since it is smaller than the sum of its proper divisors (38527536).

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

25217964 is a wasteful number, since it uses less digits than its factorization.

25217964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700509 (or 700504 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 25217964 is about 5021.7490976750. The cubic root of 25217964 is about 293.2490902482.

The spelling of 25217964 in words is "twenty-five million, two hundred seventeen thousand, nine hundred sixty-four".