25979171 has 2 divisors, whose sum is σ = 25979172. Its totient is φ = 25979170.

The previous prime is 25979159. The next prime is 25979207. The reversal of 25979171 is 17197952.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25979171 - 2¹⁴ = 25962787 is a prime.

It is not a weakly prime, because it can be changed into another prime (25979131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989585 + 12989586.

It is an arithmetic number, because the mean of its divisors is an integer number (12989586).

Almost surely, 2^25979171 is an apocalyptic number.

25979171 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979171 is an equidigital number, since it uses as much as digits as its factorization.

25979171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 41.

The square root of 25979171 is about 5096.9766528796. The cubic root of 25979171 is about 296.1704756667.

The spelling of 25979171 in words is "twenty-five million, nine hundred seventy-nine thousand, one hundred seventy-one".