252905 has 4 divisors (see below), whose sum is σ = 303492. Its totient is φ = 202320.

The previous prime is 252899. The next prime is 252911. The reversal of 252905 is 509252.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (252899) and next prime (252911).

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 120409 = 364^2 + 347^2 .

It is a de Polignac number, because none of the positive numbers 2^k-252905 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 252905.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 25286 + ... + 25295.

It is an arithmetic number, because the mean of its divisors is an integer number (75873).

2²⁵²⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

252905 is a deficient number, since it is larger than the sum of its proper divisors (50587).

252905 is an equidigital number, since it uses as much as digits as its factorization.

252905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50586.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 252905 is about 502.8966096525. The cubic root of 252905 is about 63.2391181475.

The spelling of 252905 in words is "two hundred fifty-two thousand, nine hundred five".