252391 has 2 divisors, whose sum is σ = 252392. Its totient is φ = 252390.

The previous prime is 252383. The next prime is 252401. The reversal of 252391 is 193252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252391 - 2³ = 252383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126195 + 126196.

It is an arithmetic number, because the mean of its divisors is an integer number (126196).

2²⁵²³⁹¹ is an apocalyptic number.

252391 is a deficient number, since it is larger than the sum of its proper divisors (1).

252391 is an equidigital number, since it uses as much as digits as its factorization.

252391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 252391 is about 502.3853102948. The cubic root of 252391 is about 63.1962470399.

The spelling of 252391 in words is "two hundred fifty-two thousand, three hundred ninety-one".