25789491 has 24 divisors (see below), whose sum is σ = 45849440. Its totient is φ = 13602816.

The previous prime is 25789453. The next prime is 25789501. The reversal of 25789491 is 19498752.

It is not a de Polignac number, because 25789491 - 2⁷ = 25789363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25789411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14926 + ... + 16563.

Almost surely, 2^25789491 is an apocalyptic number.

25789491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25789491 is a deficient number, since it is larger than the sum of its proper divisors (20059949).

25789491 is a wasteful number, since it uses less digits than its factorization.

25789491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31515 (or 31512 counting only the distinct ones).

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

The square root of 25789491 is about 5078.3354556390. The cubic root of 25789491 is about 295.4479109746.

The spelling of 25789491 in words is "twenty-five million, seven hundred eighty-nine thousand, four hundred ninety-one".