25826891 has 4 divisors (see below), whose sum is σ = 25897632. Its totient is φ = 25756152.

The previous prime is 25826887. The next prime is 25826951. The reversal of 25826891 is 19862852.

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 25826891 - 2² = 25826887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25826881) 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, 34820 + ... + 35553.

It is an arithmetic number, because the mean of its divisors is an integer number (6474408).

Almost surely, 2^25826891 is an apocalyptic number.

25826891 is a deficient number, since it is larger than the sum of its proper divisors (70741).

25826891 is an equidigital number, since it uses as much as digits as its factorization.

25826891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70740.

The product of its digits is 69120, while the sum is 41.

The square root of 25826891 is about 5082.0164305126. The cubic root of 25826891 is about 295.5906618171.

The spelling of 25826891 in words is "twenty-five million, eight hundred twenty-six thousand, eight hundred ninety-one".