25493651 has 2 divisors, whose sum is σ = 25493652. Its totient is φ = 25493650.

The previous prime is 25493647. The next prime is 25493707. The reversal of 25493651 is 15639452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25493651 - 2² = 25493647 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25493641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12746825 + 12746826.

It is an arithmetic number, because the mean of its divisors is an integer number (12746826).

Almost surely, 2^25493651 is an apocalyptic number.

25493651 is a deficient number, since it is larger than the sum of its proper divisors (1).

25493651 is an equidigital number, since it uses as much as digits as its factorization.

25493651 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 25493651 is about 5049.1237853711. The cubic root of 25493651 is about 294.3138356642.

The spelling of 25493651 in words is "twenty-five million, four hundred ninety-three thousand, six hundred fifty-one".