25439161 has 6 divisors (see below), whose sum is σ = 27962186. Its totient is φ = 23126400.

The previous prime is 25439159. The next prime is 25439179. The reversal of 25439161 is 16193452.

It can be written as a sum of positive squares in only one way, i.e., 23425600 + 2013561 = 4840^2 + 1419^2 .

It is not a de Polignac number, because 25439161 - 2¹ = 25439159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25439111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105000 + ... + 105241.

Almost surely, 2^25439161 is an apocalyptic number.

It is an amenable number.

25439161 is a deficient number, since it is larger than the sum of its proper divisors (2523025).

25439161 is a wasteful number, since it uses less digits than its factorization.

25439161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210263 (or 210252 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 25439161 is about 5043.7249131966. The cubic root of 25439161 is about 294.1039977925.

It can be divided in two parts, 254391 and 61, that added together give a palindrome (254452).

The spelling of 25439161 in words is "twenty-five million, four hundred thirty-nine thousand, one hundred sixty-one".