25289491 has 8 divisors (see below), whose sum is σ = 25650144. Its totient is φ = 24931200.

The previous prime is 25289483. The next prime is 25289503. The reversal of 25289491 is 19498252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25289491 - 2³ = 25289483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25289191) 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 7 ways as a sum of consecutive naturals, for example, 33666 + ... + 34408.

It is an arithmetic number, because the mean of its divisors is an integer number (3206268).

Almost surely, 2^25289491 is an apocalyptic number.

25289491 is a deficient number, since it is larger than the sum of its proper divisors (360653).

25289491 is a wasteful number, since it uses less digits than its factorization.

25289491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181.

The product of its digits is 51840, while the sum is 40.

The square root of 25289491 is about 5028.8657766936. The cubic root of 25289491 is about 293.5260809922.

The spelling of 25289491 in words is "twenty-five million, two hundred eighty-nine thousand, four hundred ninety-one".