25321161 has 16 divisors (see below), whose sum is σ = 34551360. Its totient is φ = 16489920.

The previous prime is 25321157. The next prime is 25321181. The reversal of 25321161 is 16112352.

It is not a de Polignac number, because 25321161 - 2² = 25321157 is a prime.

It is a super-2 number, since 2×25321161² = 1282322388775842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25321151) 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, 32371 + ... + 33143.

It is an arithmetic number, because the mean of its divisors is an integer number (2159460).

Almost surely, 2^25321161 is an apocalyptic number.

It is an amenable number.

25321161 is a deficient number, since it is larger than the sum of its proper divisors (9230199).

25321161 is a wasteful number, since it uses less digits than its factorization.

25321161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016.

The product of its digits is 360, while the sum is 21.

The square root of 25321161 is about 5032.0136128592. The cubic root of 25321161 is about 293.6485573367.

The spelling of 25321161 in words is "twenty-five million, three hundred twenty-one thousand, one hundred sixty-one".