25572517 has 2 divisors, whose sum is σ = 25572518. Its totient is φ = 25572516.

The previous prime is 25572511. The next prime is 25572541. The reversal of 25572517 is 71527552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25341156 + 231361 = 5034^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 25572517 - 2¹¹ = 25570469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25572511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12786258 + 12786259.

It is an arithmetic number, because the mean of its divisors is an integer number (12786259).

Almost surely, 2^25572517 is an apocalyptic number.

It is an amenable number.

25572517 is a deficient number, since it is larger than the sum of its proper divisors (1).

25572517 is an equidigital number, since it uses as much as digits as its factorization.

25572517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24500, while the sum is 34.

The square root of 25572517 is about 5056.9276245562. The cubic root of 25572517 is about 294.6170152130.

The spelling of 25572517 in words is "twenty-five million, five hundred seventy-two thousand, five hundred seventeen".