25961169 has 16 divisors (see below), whose sum is σ = 37553600. Its totient is φ = 15857856.

The previous prime is 25961153. The next prime is 25961171. The reversal of 25961169 is 96116952.

It is not a de Polignac number, because 25961169 - 2⁴ = 25961153 is a prime.

It is a super-2 number, since 2×25961169² = 1347964591693122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25961179) 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, 3027 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (2347100).

Almost surely, 2^25961169 is an apocalyptic number.

It is an amenable number.

25961169 is a deficient number, since it is larger than the sum of its proper divisors (11592431).

25961169 is a wasteful number, since it uses less digits than its factorization.

25961169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944.

The product of its digits is 29160, while the sum is 39.

The square root of 25961169 is about 5095.2103980111. The cubic root of 25961169 is about 296.1020504286.

The spelling of 25961169 in words is "twenty-five million, nine hundred sixty-one thousand, one hundred sixty-nine".