25746631 has 2 divisors, whose sum is σ = 25746632. Its totient is φ = 25746630.

The previous prime is 25746629. The next prime is 25746667. The reversal of 25746631 is 13664752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25746631 - 2¹ = 25746629 is a prime.

It is a super-2 number, since 2×25746631² = 1325778015700322, which contains 22 as substring.

Together with 25746629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25776631) 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 as a sum of consecutive naturals, namely, 12873315 + 12873316.

It is an arithmetic number, because the mean of its divisors is an integer number (12873316).

Almost surely, 2^25746631 is an apocalyptic number.

25746631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25746631 is an equidigital number, since it uses as much as digits as its factorization.

25746631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 25746631 is about 5074.1138142537. The cubic root of 25746631 is about 295.2841502287.

The spelling of 25746631 in words is "twenty-five million, seven hundred forty-six thousand, six hundred thirty-one".