25314561 has 6 divisors (see below), whose sum is σ = 36565490. Its totient is φ = 16876368.

The previous prime is 25314557. The next prime is 25314563. The reversal of 25314561 is 16541352.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 3600 = 5031^2 + 60^2 .

It is not a de Polignac number, because 25314561 - 2² = 25314557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25314563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1406356 + ... + 1406373.

Almost surely, 2^25314561 is an apocalyptic number.

It is an amenable number.

25314561 is a deficient number, since it is larger than the sum of its proper divisors (11250929).

25314561 is a wasteful number, since it uses less digits than its factorization.

25314561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812735 (or 2812732 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 25314561 is about 5031.3577690321. The cubic root of 25314561 is about 293.6230418020.

Subtracting from 25314561 its product of digits (3600), we obtain a square (25310961 = 5031²).

The spelling of 25314561 in words is "twenty-five million, three hundred fourteen thousand, five hundred sixty-one".