25156091 has 4 divisors (see below), whose sum is σ = 25178472. Its totient is φ = 25133712.

The previous prime is 25156063. The next prime is 25156093. The reversal of 25156091 is 19065152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25156091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25156093) 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, 9410 + ... + 11783.

It is an arithmetic number, because the mean of its divisors is an integer number (6294618).

Almost surely, 2^25156091 is an apocalyptic number.

25156091 is a deficient number, since it is larger than the sum of its proper divisors (22381).

25156091 is a wasteful number, since it uses less digits than its factorization.

25156091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22380.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 25156091 is about 5015.5848113655. The cubic root of 25156091 is about 293.0090621433.

The spelling of 25156091 in words is "twenty-five million, one hundred fifty-six thousand, ninety-one".