25971279 has 16 divisors (see below), whose sum is σ = 35156352. Its totient is φ = 17052768.

The previous prime is 25971263. The next prime is 25971293. The reversal of 25971279 is 97217952.

It is not a de Polignac number, because 25971279 - 2⁴ = 25971263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25971279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25971259) 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, 84444 + ... + 84750.

It is an arithmetic number, because the mean of its divisors is an integer number (2197272).

Almost surely, 2^25971279 is an apocalyptic number.

25971279 is a deficient number, since it is larger than the sum of its proper divisors (9185073).

25971279 is a wasteful number, since it uses less digits than its factorization.

25971279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 79380, while the sum is 42.

The square root of 25971279 is about 5096.2024096380. The cubic root of 25971279 is about 296.1404822267.

The spelling of 25971279 in words is "twenty-five million, nine hundred seventy-one thousand, two hundred seventy-nine".