25615297 has 2 divisors, whose sum is σ = 25615298. Its totient is φ = 25615296.

The previous prime is 25615259. The next prime is 25615313. The reversal of 25615297 is 79251652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19219456 + 6395841 = 4384^2 + 2529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25615297 is a prime.

It is a super-2 number, since 2×25615297² = 1312286880796418, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25615217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12807648 + 12807649.

It is an arithmetic number, because the mean of its divisors is an integer number (12807649).

Almost surely, 2^25615297 is an apocalyptic number.

It is an amenable number.

25615297 is a deficient number, since it is larger than the sum of its proper divisors (1).

25615297 is an equidigital number, since it uses as much as digits as its factorization.

25615297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 25615297 is about 5061.1556980595. The cubic root of 25615297 is about 294.7812109421.

The spelling of 25615297 in words is "twenty-five million, six hundred fifteen thousand, two hundred ninety-seven".