25501271 has 4 divisors (see below), whose sum is σ = 25642344. Its totient is φ = 25360200.

The previous prime is 25501261. The next prime is 25501277. The reversal of 25501271 is 17210552.

It is a happy number.

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-25501271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25501277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70265 + ... + 70626.

It is an arithmetic number, because the mean of its divisors is an integer number (6410586).

Almost surely, 2^25501271 is an apocalyptic number.

25501271 is a deficient number, since it is larger than the sum of its proper divisors (141073).

25501271 is a wasteful number, since it uses less digits than its factorization.

25501271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141072.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 25501271 is about 5049.8783153656. The cubic root of 25501271 is about 294.3431560104.

The spelling of 25501271 in words is "twenty-five million, five hundred one thousand, two hundred seventy-one".