25432979 has 12 divisors (see below), whose sum is σ = 30045672. Its totient is φ = 21340800.

The previous prime is 25432933. The next prime is 25432993. The reversal of 25432979 is 97923452.

It is not a de Polignac number, because 25432979 - 2²⁰ = 24384403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25438979) 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, 4982 + ... + 8699.

It is an arithmetic number, because the mean of its divisors is an integer number (2503806).

Almost surely, 2^25432979 is an apocalyptic number.

25432979 is a deficient number, since it is larger than the sum of its proper divisors (4612693).

25432979 is a wasteful number, since it uses less digits than its factorization.

25432979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13718 (or 13705 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 25432979 is about 5043.1120352417. The cubic root of 25432979 is about 294.0801723446.

It can be divided in two parts, 254 and 32979, that added together give a palindrome (33233).

The spelling of 25432979 in words is "twenty-five million, four hundred thirty-two thousand, nine hundred seventy-nine".