25245 has 32 divisors (see below), whose sum is σ = 51840. Its totient is φ = 11520.

The previous prime is 25243. The next prime is 25247. The reversal of 25245 is 54252.

25245 = T₆₆ + T₆₇ + ... + T₇₅.

It is an interprime number because it is at equal distance from previous prime (25243) and next prime (25247).

It is not a de Polignac number, because 25245 - 2¹ = 25243 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1477 + ... + 1493.

It is an arithmetic number, because the mean of its divisors is an integer number (1620).

2²⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

25245 is an abundant number, since it is smaller than the sum of its proper divisors (26595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25920).

25245 is a wasteful number, since it uses less digits than its factorization.

25245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42 (or 36 counting only the distinct ones).

The product of its digits is 400, while the sum is 18.

The square root of 25245 is about 158.8867521224. The cubic root of 25245 is about 29.3353849575.

Adding to 25245 its reverse (54252), we get a palindrome (79497).

The spelling of 25245 in words is "twenty-five thousand, two hundred forty-five".