25189497 has 18 divisors (see below), whose sum is σ = 38405562. Its totient is φ = 15907104.

The previous prime is 25189471. The next prime is 25189499. The reversal of 25189497 is 79498152.

It can be written as a sum of positive squares in only one way, i.e., 25160256 + 29241 = 5016^2 + 171^2 .

It is not a de Polignac number, because 25189497 - 2⁶ = 25189433 is a prime.

It is a super-2 number, since 2×25189497² = 1269021518226018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25189499) 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 in 17 ways as a sum of consecutive naturals, for example, 628 + ... + 7125.

Almost surely, 2^25189497 is an apocalyptic number.

It is an amenable number.

25189497 is a deficient number, since it is larger than the sum of its proper divisors (13216065).

25189497 is a wasteful number, since it uses less digits than its factorization.

25189497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7797 (or 7775 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 25189497 is about 5018.9139263390. The cubic root of 25189497 is about 293.1387051146.

The spelling of 25189497 in words is "twenty-five million, one hundred eighty-nine thousand, four hundred ninety-seven".