25294531 has 4 divisors (see below), whose sum is σ = 25650864. Its totient is φ = 24938200.

The previous prime is 25294523. The next prime is 25294547. The reversal of 25294531 is 13549252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25294531 - 2³ = 25294523 is a prime.

It is a super-2 number, since 2×25294531² = 1279626597019922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25294493 and 25294502.

It is not an unprimeable number, because it can be changed into a prime (25294571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178060 + ... + 178201.

It is an arithmetic number, because the mean of its divisors is an integer number (6412716).

Almost surely, 2^25294531 is an apocalyptic number.

25294531 is a deficient number, since it is larger than the sum of its proper divisors (356333).

25294531 is an equidigital number, since it uses as much as digits as its factorization.

25294531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356332.

The product of its digits is 10800, while the sum is 31.

The square root of 25294531 is about 5029.3668587607. The cubic root of 25294531 is about 293.5455788564.

The spelling of 25294531 in words is "twenty-five million, two hundred ninety-four thousand, five hundred thirty-one".