25940731 has 2 divisors, whose sum is σ = 25940732. Its totient is φ = 25940730.

The previous prime is 25940729. The next prime is 25940749. The reversal of 25940731 is 13704952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25940731 - 2¹ = 25940729 is a prime.

It is a super-2 number, since 2×25940731² = 1345843049628722, which contains 22 as substring.

Together with 25940729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25940693 and 25940702.

It is not a weakly prime, because it can be changed into another prime (25940701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12970365 + 12970366.

It is an arithmetic number, because the mean of its divisors is an integer number (12970366).

Almost surely, 2^25940731 is an apocalyptic number.

25940731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25940731 is an equidigital number, since it uses as much as digits as its factorization.

25940731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 25940731 is about 5093.2043940922. The cubic root of 25940731 is about 296.0243276511.

The spelling of 25940731 in words is "twenty-five million, nine hundred forty thousand, seven hundred thirty-one".