252091 has 4 divisors (see below), whose sum is σ = 288112. Its totient is φ = 216072.

The previous prime is 252079. The next prime is 252101. The reversal of 252091 is 190252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252091 - 2¹¹ = 250043 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18000 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (72028).

2²⁵²⁰⁹¹ is an apocalyptic number.

252091 is a deficient number, since it is larger than the sum of its proper divisors (36021).

252091 is an equidigital number, since it uses as much as digits as its factorization.

252091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36020.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 252091 is about 502.0866459089. The cubic root of 252091 is about 63.1711980870.

It can be divided in two parts, 25 and 2091, that added together give a square (2116 = 46²).

The spelling of 252091 in words is "two hundred fifty-two thousand, ninety-one".