25941557 has 4 divisors (see below), whose sum is σ = 25952640. Its totient is φ = 25930476.

The previous prime is 25941527. The next prime is 25941563. The reversal of 25941557 is 75514952.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25941557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25941557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25941527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (6488160).

Almost surely, 2^25941557 is an apocalyptic number.

It is an amenable number.

25941557 is a deficient number, since it is larger than the sum of its proper divisors (11083).

25941557 is an equidigital number, since it uses as much as digits as its factorization.

25941557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11082.

The product of its digits is 63000, while the sum is 38.

The square root of 25941557 is about 5093.2854818869. The cubic root of 25941557 is about 296.0274696019.

The spelling of 25941557 in words is "twenty-five million, nine hundred forty-one thousand, five hundred fifty-seven".