25494731 has 2 divisors, whose sum is σ = 25494732. Its totient is φ = 25494730.

The previous prime is 25494709. The next prime is 25494757. The reversal of 25494731 is 13749452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25494731 - 2¹⁰ = 25493707 is a prime.

It is a super-2 number, since 2×25494731² = 1299962617524722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25494691 and 25494700.

It is not a weakly prime, because it can be changed into another prime (25494701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12747365 + 12747366.

It is an arithmetic number, because the mean of its divisors is an integer number (12747366).

Almost surely, 2^25494731 is an apocalyptic number.

25494731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25494731 is an equidigital number, since it uses as much as digits as its factorization.

25494731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 25494731 is about 5049.2307334880. The cubic root of 25494731 is about 294.3179916592.

The spelling of 25494731 in words is "twenty-five million, four hundred ninety-four thousand, seven hundred thirty-one".