25657427 has 2 divisors, whose sum is σ = 25657428. Its totient is φ = 25657426.

The previous prime is 25657417. The next prime is 25657439. The reversal of 25657427 is 72475652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25657427 - 2²⁴ = 8880211 is a prime.

It is not a weakly prime, because it can be changed into another prime (25657417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828713 + 12828714.

It is an arithmetic number, because the mean of its divisors is an integer number (12828714).

Almost surely, 2^25657427 is an apocalyptic number.

25657427 is a deficient number, since it is larger than the sum of its proper divisors (1).

25657427 is an equidigital number, since it uses as much as digits as its factorization.

25657427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 38.

The square root of 25657427 is about 5065.3160809568. The cubic root of 25657427 is about 294.9427333060.

The spelling of 25657427 in words is "twenty-five million, six hundred fifty-seven thousand, four hundred twenty-seven".