25875891 has 18 divisors (see below), whose sum is σ = 39444860. Its totient is φ = 16300656.

The previous prime is 25875881. The next prime is 25875901. The reversal of 25875891 is 19857852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25875881) and next prime (25875901).

It is not a de Polignac number, because 25875891 - 2⁶ = 25875827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25875821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66325 + ... + 66713.

Almost surely, 2^25875891 is an apocalyptic number.

25875891 is a deficient number, since it is larger than the sum of its proper divisors (13568969).

25875891 is an equidigital number, since it uses as much as digits as its factorization.

25875891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 411 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 25875891 is about 5086.8350671120. The cubic root of 25875891 is about 295.7774799182. Note that the first 3 decimals are identical.

The spelling of 25875891 in words is "twenty-five million, eight hundred seventy-five thousand, eight hundred ninety-one".