25135872 has 72 divisors (see below), whose sum is σ = 69855744. Its totient is φ = 8008704.

The previous prime is 25135867. The next prime is 25135897. The reversal of 25135872 is 27853152.

It is a super-2 number, since 2×25135872² = 1263624122400768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16953 + ... + 18375.

Almost surely, 2^25135872 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 25135872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34927872).

25135872 is an abundant number, since it is smaller than the sum of its proper divisors (44719872).

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

25135872 is a wasteful number, since it uses less digits than its factorization.

25135872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465 (or 1451 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 25135872 is about 5013.5687887971. The cubic root of 25135872 is about 292.9305398992.

It can be divided in two parts, 2513 and 5872, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 25135872 in words is "twenty-five million, one hundred thirty-five thousand, eight hundred seventy-two".