25317612 has 18 divisors (see below), whose sum is σ = 63997388. Its totient is φ = 8439192.

The previous prime is 25317571. The next prime is 25317619. The reversal of 25317612 is 21671352.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (25317619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 351598 + ... + 351669.

Almost surely, 2^25317612 is an apocalyptic number.

It is an amenable number.

25317612 is an abundant number, since it is smaller than the sum of its proper divisors (38679776).

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

25317612 is a wasteful number, since it uses less digits than its factorization.

25317612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703277 (or 703272 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 25317612 is about 5031.6609583715. The cubic root of 25317612 is about 293.6348374889.

Adding to 25317612 its reverse (21671352), we get a palindrome (46988964).

The spelling of 25317612 in words is "twenty-five million, three hundred seventeen thousand, six hundred twelve".