25545 has 16 divisors (see below), whose sum is σ = 44352. Its totient is φ = 12480.

The previous prime is 25541. The next prime is 25561. The reversal of 25545 is 54552.

25545 is nontrivially palindromic in base 4 and base 14.

25545 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 25545 - 2² = 25541 is a prime.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25545.

It is not an unprimeable number, because it can be changed into a prime (25541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130 + ... + 260.

It is an arithmetic number, because the mean of its divisors is an integer number (2772).

2²⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

25545 is a deficient number, since it is larger than the sum of its proper divisors (18807).

25545 is a wasteful number, since it uses less digits than its factorization.

25545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

The product of its digits is 1000, while the sum is 21.

The square root of 25545 is about 159.8280325850. The cubic root of 25545 is about 29.4511304253.

It can be divided in two parts, 255 and 45, that added together give a triangular number (300 = T₂₄).

The spelling of 25545 in words is "twenty-five thousand, five hundred forty-five".