252691 has 2 divisors, whose sum is σ = 252692. Its totient is φ = 252690.

The previous prime is 252667. The next prime is 252709. The reversal of 252691 is 196252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252691 - 2¹¹ = 250643 is a prime.

It is not a weakly prime, because it can be changed into another prime (252611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126345 + 126346.

It is an arithmetic number, because the mean of its divisors is an integer number (126346).

2²⁵²⁶⁹¹ is an apocalyptic number.

252691 is a deficient number, since it is larger than the sum of its proper divisors (1).

252691 is an equidigital number, since it uses as much as digits as its factorization.

252691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 252691 is about 502.6837972324. The cubic root of 252691 is about 63.2212761513.

The spelling of 252691 in words is "two hundred fifty-two thousand, six hundred ninety-one".