25115897 has 2 divisors, whose sum is σ = 25115898. Its totient is φ = 25115896.

The previous prime is 25115873. The next prime is 25115899. The reversal of 25115897 is 79851152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25110121 + 5776 = 5011^2 + 76^2 .

It is a cyclic number.

It is not a de Polignac number, because 25115897 - 2⁸ = 25115641 is a prime.

It is a super-2 number, since 2×25115897² = 1261616564229218, which contains 22 as substring.

Together with 25115899, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1572788 and since 25115897 and 1572788 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25115897.

It is not a weakly prime, because it can be changed into another prime (25115899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557948 + 12557949.

It is an arithmetic number, because the mean of its divisors is an integer number (12557949).

Almost surely, 2^25115897 is an apocalyptic number.

It is an amenable number.

25115897 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115897 is an equidigital number, since it uses as much as digits as its factorization.

25115897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 25115897 is about 5011.5762989303. The cubic root of 25115897 is about 292.8529238904.

The spelling of 25115897 in words is "twenty-five million, one hundred fifteen thousand, eight hundred ninety-seven".