25613172 has 72 divisors (see below), whose sum is σ = 72342816. Its totient is φ = 7877088.

The previous prime is 25613149. The next prime is 25613173. The reversal of 25613172 is 27131652.

It is a happy number.

25613172 is a `hidden beast` number, since 2 + 561 + 31 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25613173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11623 + ... + 13649.

Almost surely, 2^25613172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25613172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36171408).

25613172 is an abundant number, since it is smaller than the sum of its proper divisors (46729644).

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

25613172 is a wasteful number, since it uses less digits than its factorization.

25613172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2045 counting only the distinct ones).

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

The square root of 25613172 is about 5060.9457614165. The cubic root of 25613172 is about 294.7730592064.

The spelling of 25613172 in words is "twenty-five million, six hundred thirteen thousand, one hundred seventy-two".