25517289 has 24 divisors (see below), whose sum is σ = 41910048. Its totient is φ = 13722240.

The previous prime is 25517263. The next prime is 25517291. The reversal of 25517289 is 98271552.

It is not a de Polignac number, because 25517289 - 2⁵ = 25517257 is a prime.

It is a super-2 number, since 2×25517289² = 1302264075819042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25517299) 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 in 23 ways as a sum of consecutive naturals, for example, 2607 + ... + 7604.

It is an arithmetic number, because the mean of its divisors is an integer number (1746252).

Almost surely, 2^25517289 is an apocalyptic number.

It is an amenable number.

25517289 is a deficient number, since it is larger than the sum of its proper divisors (16392759).

25517289 is a wasteful number, since it uses less digits than its factorization.

25517289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10245 (or 10238 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 25517289 is about 5051.4640452051. The cubic root of 25517289 is about 294.4047712643.

The spelling of 25517289 in words is "twenty-five million, five hundred seventeen thousand, two hundred eighty-nine".