25992517 has 2 divisors, whose sum is σ = 25992518. Its totient is φ = 25992516.

The previous prime is 25992493. The next prime is 25992523. The reversal of 25992517 is 71529952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25948836 + 43681 = 5094^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 25992517 - 2¹¹ = 25990469 is a prime.

It is a super-2 number, since 2×25992517² = 1351221879990578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25992517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25992017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996258 + 12996259.

It is an arithmetic number, because the mean of its divisors is an integer number (12996259).

Almost surely, 2^25992517 is an apocalyptic number.

It is an amenable number.

25992517 is a deficient number, since it is larger than the sum of its proper divisors (1).

25992517 is an equidigital number, since it uses as much as digits as its factorization.

25992517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 25992517 is about 5098.2856922695. The cubic root of 25992517 is about 296.2211831418.

The spelling of 25992517 in words is "twenty-five million, nine hundred ninety-two thousand, five hundred seventeen".