25169 has 2 divisors, whose sum is σ = 25170. Its totient is φ = 25168.

The previous prime is 25163. The next prime is 25171. The reversal of 25169 is 96152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18769 + 6400 = 137^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 25169 - 2⁴ = 25153 is a prime.

It is a super-2 number, since 2×25169² = 1266957122, which contains 22 as substring.

Together with 25171, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (25163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12584 + 12585.

It is an arithmetic number, because the mean of its divisors is an integer number (12585).

2²⁵¹⁶⁹ is an apocalyptic number.

It is an amenable number.

25169 is a deficient number, since it is larger than the sum of its proper divisors (1).

25169 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 12 representation: 25169 = (12695)₁₂.

25169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 25169 is about 158.6474077948. The cubic root of 25169 is about 29.3059173362.

It can be divided in two parts, 25 and 169, that multiplied together give a square (4225 = 65²).

The spelling of 25169 in words is "twenty-five thousand, one hundred sixty-nine".