25970891 has 4 divisors (see below), whose sum is σ = 27337800. Its totient is φ = 24603984.

The previous prime is 25970873. The next prime is 25970897. The reversal of 25970891 is 19807952.

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 25970891 - 2⁶ = 25970827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25970897) 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 3 ways as a sum of consecutive naturals, for example, 683426 + ... + 683463.

It is an arithmetic number, because the mean of its divisors is an integer number (6834450).

Almost surely, 2^25970891 is an apocalyptic number.

25970891 is a deficient number, since it is larger than the sum of its proper divisors (1366909).

25970891 is a wasteful number, since it uses less digits than its factorization.

25970891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366908.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 25970891 is about 5096.1643419340. The cubic root of 25970891 is about 296.1390074812.

The spelling of 25970891 in words is "twenty-five million, nine hundred seventy thousand, eight hundred ninety-one".