252787 has 4 divisors (see below), whose sum is σ = 253800. Its totient is φ = 251776.

The previous prime is 252779. The next prime is 252817. The reversal of 252787 is 787252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 252787 - 2³ = 252779 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252727) 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 in 3 ways as a sum of consecutive naturals, for example, 168 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (63450).

2²⁵²⁷⁸⁷ is an apocalyptic number.

252787 is a deficient number, since it is larger than the sum of its proper divisors (1013).

252787 is an equidigital number, since it uses as much as digits as its factorization.

252787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012.

The product of its digits is 7840, while the sum is 31.

The square root of 252787 is about 502.7792756270. The cubic root of 252787 is about 63.2292812828.

The spelling of 252787 in words is "two hundred fifty-two thousand, seven hundred eighty-seven".