25757591 has 2 divisors, whose sum is σ = 25757592. Its totient is φ = 25757590.

The previous prime is 25757569. The next prime is 25757617. The reversal of 25757591 is 19575752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25757591 - 2⁶ = 25757527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25757531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12878795 + 12878796.

It is an arithmetic number, because the mean of its divisors is an integer number (12878796).

Almost surely, 2^25757591 is an apocalyptic number.

25757591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25757591 is an equidigital number, since it uses as much as digits as its factorization.

25757591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110250, while the sum is 41.

The square root of 25757591 is about 5075.1936908851. The cubic root of 25757591 is about 295.3260438028.

The spelling of 25757591 in words is "twenty-five million, seven hundred fifty-seven thousand, five hundred ninety-one".