25731369 has 12 divisors (see below), whose sum is σ = 37213956. Its totient is φ = 17132832.

The previous prime is 25731359. The next prime is 25731371. The reversal of 25731369 is 96313752.

It can be written as a sum of positive squares in 2 ways, for example, as 2576025 + 23155344 = 1605^2 + 4812^2 .

It is not a de Polignac number, because 25731369 - 2¹¹ = 25729321 is a prime.

It is a super-2 number, since 2×25731369² = 1324206701228322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25731359) 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, 9739 + ... + 12095.

It is an arithmetic number, because the mean of its divisors is an integer number (3101163).

Almost surely, 2^25731369 is an apocalyptic number.

It is an amenable number.

25731369 is a deficient number, since it is larger than the sum of its proper divisors (11482587).

25731369 is a wasteful number, since it uses less digits than its factorization.

25731369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576 (or 3573 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 25731369 is about 5072.6096833878. The cubic root of 25731369 is about 295.2257928528.

It can be divided in two parts, 257 and 31369, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 25731369 in words is "twenty-five million, seven hundred thirty-one thousand, three hundred sixty-nine".