25072499 has 4 divisors (see below), whose sum is σ = 25112136. Its totient is φ = 25032864.

The previous prime is 25072469. The next prime is 25072513. The reversal of 25072499 is 99427052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25072499 is a prime.

It is a super-2 number, since 2×25072499² = 1257260412210002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25072409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18854 + ... + 20139.

It is an arithmetic number, because the mean of its divisors is an integer number (6278034).

Almost surely, 2^25072499 is an apocalyptic number.

25072499 is a deficient number, since it is larger than the sum of its proper divisors (39637).

25072499 is an equidigital number, since it uses as much as digits as its factorization.

25072499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39636.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 25072499 is about 5007.2446515025. The cubic root of 25072499 is about 292.6841521843.

The spelling of 25072499 in words is "twenty-five million, seventy-two thousand, four hundred ninety-nine".