25195091 has 4 divisors (see below), whose sum is σ = 25206384. Its totient is φ = 25183800.

The previous prime is 25195081. The next prime is 25195103. The reversal of 25195091 is 19059152.

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 a de Polignac number, because none of the positive numbers 2^k-25195091 is a prime.

It is a super-2 number, since 2×25195091² = 1269585220996562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25195081) 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, 1055 + ... + 7176.

It is an arithmetic number, because the mean of its divisors is an integer number (6301596).

Almost surely, 2^25195091 is an apocalyptic number.

25195091 is a deficient number, since it is larger than the sum of its proper divisors (11293).

25195091 is an equidigital number, since it uses as much as digits as its factorization.

25195091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11292.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 25195091 is about 5019.4711872866. The cubic root of 25195091 is about 293.1604032658.

The spelling of 25195091 in words is "twenty-five million, one hundred ninety-five thousand, ninety-one".