252491 has 8 divisors (see below), whose sum is σ = 270480. Its totient is φ = 235008.

The previous prime is 252481. The next prime is 252509. The reversal of 252491 is 194252.

252491 = T₁₈ + T₁₉ + ... + T₁₁₄.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252491 - 2¹⁰ = 251467 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 252491.

It is not an unprimeable number, because it can be changed into a prime (252401) 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 in 7 ways as a sum of consecutive naturals, for example, 1775 + ... + 1911.

It is an arithmetic number, because the mean of its divisors is an integer number (33810).

2²⁵²⁴⁹¹ is an apocalyptic number.

252491 is a deficient number, since it is larger than the sum of its proper divisors (17989).

252491 is a wasteful number, since it uses less digits than its factorization.

252491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253.

The product of its digits is 720, while the sum is 23.

The square root of 252491 is about 502.4848256415. The cubic root of 252491 is about 63.2045922797.

The spelling of 252491 in words is "two hundred fifty-two thousand, four hundred ninety-one".