25273491 has 4 divisors (see below), whose sum is σ = 33697992. Its totient is φ = 16848992.

The previous prime is 25273483. The next prime is 25273517. The reversal of 25273491 is 19437252.

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

It is a cyclic number.

It is not a de Polignac number, because 25273491 - 2³ = 25273483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25273411) 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, 4212246 + ... + 4212251.

It is an arithmetic number, because the mean of its divisors is an integer number (8424498).

Almost surely, 2^25273491 is an apocalyptic number.

25273491 is a deficient number, since it is larger than the sum of its proper divisors (8424501).

25273491 is an equidigital number, since it uses as much as digits as its factorization.

25273491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424500.

The product of its digits is 15120, while the sum is 33.

The square root of 25273491 is about 5027.2747090248. The cubic root of 25273491 is about 293.4641658397.

The spelling of 25273491 in words is "twenty-five million, two hundred seventy-three thousand, four hundred ninety-one".