25471121 has 4 divisors (see below), whose sum is σ = 27430452. Its totient is φ = 23511792.

The previous prime is 25471091. The next prime is 25471157. The reversal of 25471121 is 12117452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16851025 + 8620096 = 4105^2 + 2936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25471121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25471021) 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, 979646 + ... + 979671.

It is an arithmetic number, because the mean of its divisors is an integer number (6857613).

Almost surely, 2^25471121 is an apocalyptic number.

It is an amenable number.

25471121 is a deficient number, since it is larger than the sum of its proper divisors (1959331).

25471121 is a wasteful number, since it uses less digits than its factorization.

25471121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959330.

The product of its digits is 560, while the sum is 23.

The square root of 25471121 is about 5046.8922120450. The cubic root of 25471121 is about 294.2271102147.

Adding to 25471121 its reverse (12117452), we get a palindrome (37588573).

The spelling of 25471121 in words is "twenty-five million, four hundred seventy-one thousand, one hundred twenty-one".