25540557 has 16 divisors (see below), whose sum is σ = 40611840. Its totient is φ = 13959792.

The previous prime is 25540549. The next prime is 25540591. The reversal of 25540557 is 75504552.

It is not a de Polignac number, because 25540557 - 2³ = 25540549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25957 + ... + 26922.

It is an arithmetic number, because the mean of its divisors is an integer number (2538240).

Almost surely, 2^25540557 is an apocalyptic number.

It is an amenable number.

25540557 is a deficient number, since it is larger than the sum of its proper divisors (15071283).

25540557 is a wasteful number, since it uses less digits than its factorization.

25540557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52912.

The product of its (nonzero) digits is 35000, while the sum is 33.

The square root of 25540557 is about 5053.7666151100. The cubic root of 25540557 is about 294.4942286402.

The spelling of 25540557 in words is "twenty-five million, five hundred forty thousand, five hundred fifty-seven".