25122173 has 2 divisors, whose sum is σ = 25122174. Its totient is φ = 25122172.

The previous prime is 25122157. The next prime is 25122197. The reversal of 25122173 is 37122152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24870169 + 252004 = 4987^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 25122173 - 2⁴ = 25122157 is a prime.

It is a super-2 number, since 2×25122173² = 1262247152483858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25122103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561086 + 12561087.

It is an arithmetic number, because the mean of its divisors is an integer number (12561087).

Almost surely, 2^25122173 is an apocalyptic number.

It is an amenable number.

25122173 is a deficient number, since it is larger than the sum of its proper divisors (1).

25122173 is an equidigital number, since it uses as much as digits as its factorization.

25122173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 25122173 is about 5012.2024101187. The cubic root of 25122173 is about 292.8773147092.

The spelling of 25122173 in words is "twenty-five million, one hundred twenty-two thousand, one hundred seventy-three".