25161 has 4 divisors (see below), whose sum is σ = 33552. Its totient is φ = 16772.

The previous prime is 25153. The next prime is 25163. The reversal of 25161 is 16152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25161 - 2³ = 25153 is a prime.

It is a D-number.

It is a plaindrome in base 12.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 25161.

It is not an unprimeable number, because it can be changed into a prime (25163) 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, 4191 + ... + 4196.

It is an arithmetic number, because the mean of its divisors is an integer number (8388).

2²⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

25161 is a deficient number, since it is larger than the sum of its proper divisors (8391).

25161 is an equidigital number, since it uses as much as digits as its factorization.

25161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8390.

The product of its digits is 60, while the sum is 15.

The square root of 25161 is about 158.6221926466. The cubic root of 25161 is about 29.3028120323.

Subtracting from 25161 its reverse (16152), we obtain a palindrome (9009).

The spelling of 25161 in words is "twenty-five thousand, one hundred sixty-one".