25600891 has 4 divisors (see below), whose sum is σ = 25764112. Its totient is φ = 25437672.

The previous prime is 25600811. The next prime is 25600903. The reversal of 25600891 is 19800652.

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

It is a cyclic number.

It is not a de Polignac number, because 25600891 - 2¹⁷ = 25469819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25600811) 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, 81375 + ... + 81688.

It is an arithmetic number, because the mean of its divisors is an integer number (6441028).

Almost surely, 2^25600891 is an apocalyptic number.

25600891 is a deficient number, since it is larger than the sum of its proper divisors (163221).

25600891 is a wasteful number, since it uses less digits than its factorization.

25600891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163220.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 25600891 is about 5059.7323051719. The cubic root of 25600891 is about 294.7259390933.

The spelling of 25600891 in words is "twenty-five million, six hundred thousand, eight hundred ninety-one".