25445897 has 2 divisors, whose sum is σ = 25445898. Its totient is φ = 25445896.

The previous prime is 25445887. The next prime is 25445909. The reversal of 25445897 is 79854452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14661241 + 10784656 = 3829^2 + 3284^2 .

It is a cyclic number.

It is not a de Polignac number, because 25445897 - 2⁴ = 25445881 is a prime.

It is not a weakly prime, because it can be changed into another prime (25445867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722948 + 12722949.

It is an arithmetic number, because the mean of its divisors is an integer number (12722949).

Almost surely, 2^25445897 is an apocalyptic number.

It is an amenable number.

25445897 is a deficient number, since it is larger than the sum of its proper divisors (1).

25445897 is an equidigital number, since it uses as much as digits as its factorization.

25445897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The square root of 25445897 is about 5044.3926294451. The cubic root of 25445897 is about 294.1299539642.

The spelling of 25445897 in words is "twenty-five million, four hundred forty-five thousand, eight hundred ninety-seven".