252181 has 2 divisors, whose sum is σ = 252182. Its totient is φ = 252180.

The previous prime is 252173. The next prime is 252193. The reversal of 252181 is 181252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140625 + 111556 = 375^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 252181 - 2³ = 252173 is a prime.

It is a super-2 number, since 2×252181² = 127190513522, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

252181 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126090 + 126091.

It is an arithmetic number, because the mean of its divisors is an integer number (126091).

2²⁵²¹⁸¹ is an apocalyptic number.

It is an amenable number.

252181 is a deficient number, since it is larger than the sum of its proper divisors (1).

252181 is an equidigital number, since it uses as much as digits as its factorization.

252181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 19.

The square root of 252181 is about 502.1762638755. The cubic root of 252181 is about 63.1787148586.

The spelling of 252181 in words is "two hundred fifty-two thousand, one hundred eighty-one".