25542656 has 30 divisors (see below), whose sum is σ = 51116520. Its totient is φ = 12763136.

The previous prime is 25542641. The next prime is 25542677. The reversal of 25542656 is 65624552.

25542656 is nontrivially palindromic in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605 + ... + 17163.

It is an arithmetic number, because the mean of its divisors is an integer number (1703884).

Almost surely, 2^25542656 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 25542656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25558260).

25542656 is an abundant number, since it is smaller than the sum of its proper divisors (25573864).

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

25542656 is an frugal number, since it uses more digits than its factorization.

25542656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1561 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 25542656 is about 5053.9742777343. The cubic root of 25542656 is about 294.5022958939.

The spelling of 25542656 in words is "twenty-five million, five hundred forty-two thousand, six hundred fifty-six".