25442171 has 4 divisors (see below), whose sum is σ = 25454952. Its totient is φ = 25429392.

The previous prime is 25442167. The next prime is 25442177. The reversal of 25442171 is 17124452.

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 25442171 - 2² = 25442167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25442171.

It is not an unprimeable number, because it can be changed into a prime (25442177) 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, 2690 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (6363738).

Almost surely, 2^25442171 is an apocalyptic number.

25442171 is a deficient number, since it is larger than the sum of its proper divisors (12781).

25442171 is a wasteful number, since it uses less digits than its factorization.

25442171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12780.

The product of its digits is 2240, while the sum is 26.

The square root of 25442171 is about 5044.0232949502. The cubic root of 25442171 is about 294.1155969449.

The spelling of 25442171 in words is "twenty-five million, four hundred forty-two thousand, one hundred seventy-one".