25970491 has 4 divisors (see below), whose sum is σ = 25980984. Its totient is φ = 25960000.

The previous prime is 25970479. The next prime is 25970501. The reversal of 25970491 is 19407952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25970491 - 2⁵ = 25970459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25970491.

It is not an unprimeable number, because it can be changed into a prime (25970431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756 + ... + 7246.

It is an arithmetic number, because the mean of its divisors is an integer number (6495246).

Almost surely, 2^25970491 is an apocalyptic number.

25970491 is a deficient number, since it is larger than the sum of its proper divisors (10493).

25970491 is an equidigital number, since it uses as much as digits as its factorization.

25970491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10492.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 25970491 is about 5096.1250965807. The cubic root of 25970491 is about 296.1374871097.

The spelling of 25970491 in words is "twenty-five million, nine hundred seventy thousand, four hundred ninety-one".