25170 has 16 divisors (see below), whose sum is σ = 60480. Its totient is φ = 6704.

The previous prime is 25169. The next prime is 25171. The reversal of 25170 is 7152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25169) and next prime (25171).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390 + ... + 449.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

2²⁵¹⁷⁰ is an apocalyptic number.

25170 is an abundant number, since it is smaller than the sum of its proper divisors (35310).

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 (30240).

25170 is a wasteful number, since it uses less digits than its factorization.

25170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 25170 is about 158.6505594065. The cubic root of 25170 is about 29.3063054530.

The spelling of 25170 in words is "twenty-five thousand, one hundred seventy".