25965431 has 2 divisors, whose sum is σ = 25965432. Its totient is φ = 25965430.

The previous prime is 25965427. The next prime is 25965437. The reversal of 25965431 is 13456952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25965431 - 2² = 25965427 is a prime.

It is a super-2 number, since 2×25965431² = 1348407214031522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25965391 and 25965400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25965437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12982715 + 12982716.

It is an arithmetic number, because the mean of its divisors is an integer number (12982716).

Almost surely, 2^25965431 is an apocalyptic number.

25965431 is a deficient number, since it is larger than the sum of its proper divisors (1).

25965431 is an equidigital number, since it uses as much as digits as its factorization.

25965431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 25965431 is about 5095.6286167656. The cubic root of 25965431 is about 296.1182530616.

The spelling of 25965431 in words is "twenty-five million, nine hundred sixty-five thousand, four hundred thirty-one".