25015897 has 2 divisors, whose sum is σ = 25015898. Its totient is φ = 25015896.

The previous prime is 25015877. The next prime is 25015901. The reversal of 25015897 is 79851052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23707161 + 1308736 = 4869^2 + 1144^2 .

It is a cyclic number.

It is not a de Polignac number, because 25015897 - 2¹⁹ = 24491609 is a prime.

It is not a weakly prime, because it can be changed into another prime (25015817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12507948 + 12507949.

It is an arithmetic number, because the mean of its divisors is an integer number (12507949).

Almost surely, 2^25015897 is an apocalyptic number.

It is an amenable number.

25015897 is a deficient number, since it is larger than the sum of its proper divisors (1).

25015897 is an equidigital number, since it uses as much as digits as its factorization.

25015897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 25015897 is about 5001.5894473657. The cubic root of 25015897 is about 292.4637381692.

The spelling of 25015897 in words is "twenty-five million, fifteen thousand, eight hundred ninety-seven".