25656542 has 4 divisors (see below), whose sum is σ = 38484816. Its totient is φ = 12828270.

The previous prime is 25656541. The next prime is 25656551. The reversal of 25656542 is 24565652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25656541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6414134 + ... + 6414137.

It is an arithmetic number, because the mean of its divisors is an integer number (9621204).

Almost surely, 2^25656542 is an apocalyptic number.

25656542 is a deficient number, since it is larger than the sum of its proper divisors (12828274).

25656542 is a wasteful number, since it uses less digits than its factorization.

25656542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12828273.

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

The square root of 25656542 is about 5065.2287213906. The cubic root of 25656542 is about 294.9393421200.

The spelling of 25656542 in words is "twenty-five million, six hundred fifty-six thousand, five hundred forty-two".