25193491 has 4 divisors (see below), whose sum is σ = 25438192. Its totient is φ = 24948792.

The previous prime is 25193479. The next prime is 25193503. The reversal of 25193491 is 19439152.

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

It is an interprime number because it is at equal distance from previous prime (25193479) and next prime (25193503).

It is a cyclic number.

It is not a de Polignac number, because 25193491 - 2⁵ = 25193459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25193401) 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, 122196 + ... + 122401.

It is an arithmetic number, because the mean of its divisors is an integer number (6359548).

Almost surely, 2^25193491 is an apocalyptic number.

25193491 is a deficient number, since it is larger than the sum of its proper divisors (244701).

25193491 is a wasteful number, since it uses less digits than its factorization.

25193491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244700.

The product of its digits is 9720, while the sum is 34.

The square root of 25193491 is about 5019.3118054172. The cubic root of 25193491 is about 293.1541974726.

The spelling of 25193491 in words is "twenty-five million, one hundred ninety-three thousand, four hundred ninety-one".