25601889 has 12 divisors (see below), whose sum is σ = 34529424. Its totient is φ = 16873344.

The previous prime is 25601879. The next prime is 25601893. The reversal of 25601889 is 98810652.

It is not a de Polignac number, because 25601889 - 2⁸ = 25601633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25601869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27774 + ... + 28680.

It is an arithmetic number, because the mean of its divisors is an integer number (2877452).

Almost surely, 2^25601889 is an apocalyptic number.

It is an amenable number.

25601889 is a deficient number, since it is larger than the sum of its proper divisors (8927535).

25601889 is an frugal number, since it uses more digits than its factorization.

25601889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 25601889 is about 5059.8309260291. The cubic root of 25601889 is about 294.7297688124.

The spelling of 25601889 in words is "twenty-five million, six hundred one thousand, eight hundred eighty-nine".