25245491 has 2 divisors, whose sum is σ = 25245492. Its totient is φ = 25245490.

The previous prime is 25245431. The next prime is 25245499. The reversal of 25245491 is 19454252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25245491 - 2⁶ = 25245427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25245499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12622745 + 12622746.

It is an arithmetic number, because the mean of its divisors is an integer number (12622746).

Almost surely, 2^25245491 is an apocalyptic number.

25245491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25245491 is an equidigital number, since it uses as much as digits as its factorization.

25245491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 25245491 is about 5024.4891282597. The cubic root of 25245491 is about 293.3557514145.

The spelling of 25245491 in words is "twenty-five million, two hundred forty-five thousand, four hundred ninety-one".