25536497 has 6 divisors (see below), whose sum is σ = 29705778. Its totient is φ = 21888384.

The previous prime is 25536479. The next prime is 25536517. The reversal of 25536497 is 79463552.

It can be written as a sum of positive squares in only one way, i.e., 23804641 + 1731856 = 4879^2 + 1316^2 .

It is not a de Polignac number, because 25536497 - 2¹² = 25532401 is a prime.

It is a super-2 number, since 2×25536497² = 1304225358062018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25536457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 260528 + ... + 260625.

It is an arithmetic number, because the mean of its divisors is an integer number (4950963).

Almost surely, 2^25536497 is an apocalyptic number.

It is an amenable number.

25536497 is a deficient number, since it is larger than the sum of its proper divisors (4169281).

25536497 is an equidigital number, since it uses as much as digits as its factorization.

25536497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521167 (or 521160 counting only the distinct ones).

The product of its digits is 226800, while the sum is 41.

The square root of 25536497 is about 5053.3649185468. The cubic root of 25536497 is about 294.4786232650.

The spelling of 25536497 in words is "twenty-five million, five hundred thirty-six thousand, four hundred ninety-seven".