25173 has 6 divisors (see below), whose sum is σ = 36374. Its totient is φ = 16776.

The previous prime is 25171. The next prime is 25183. The reversal of 25173 is 37152.

It can be written as a sum of positive squares in only one way, i.e., 23409 + 1764 = 153^2 + 42^2 .

It is not a de Polignac number, because 25173 - 2¹ = 25171 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1390 + ... + 1407.

2²⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

25173 is a deficient number, since it is larger than the sum of its proper divisors (11201).

25173 is a wasteful number, since it uses less digits than its factorization.

25173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803 (or 2800 counting only the distinct ones).

The product of its digits is 210, while the sum is 18.

The square root of 25173 is about 158.6600138661. The cubic root of 25173 is about 29.3074697415.

It can be divided in two parts, 251 and 73, that added together give a square (324 = 18²).

The spelling of 25173 in words is "twenty-five thousand, one hundred seventy-three".