25418997 has 6 divisors (see below), whose sum is σ = 36716342. Its totient is φ = 16945992.

The previous prime is 25418983. The next prime is 25419001. The reversal of 25418997 is 79981452.

It can be written as a sum of positive squares in only one way, i.e., 25341156 + 77841 = 5034^2 + 279^2 .

It is not a de Polignac number, because 25418997 - 2²⁴ = 8641781 is a prime.

It is a super-2 number, since 2×25418997² = 1292250816972018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25418917) 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, 1412158 + ... + 1412175.

Almost surely, 2^25418997 is an apocalyptic number.

It is an amenable number.

25418997 is a deficient number, since it is larger than the sum of its proper divisors (11297345).

25418997 is a wasteful number, since it uses less digits than its factorization.

25418997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824339 (or 2824336 counting only the distinct ones).

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

The square root of 25418997 is about 5041.7255974517. The cubic root of 25418997 is about 294.0262714272.

The spelling of 25418997 in words is "twenty-five million, four hundred eighteen thousand, nine hundred ninety-seven".