252740 has 12 divisors (see below), whose sum is σ = 530796. Its totient is φ = 101088.

The previous prime is 252737. The next prime is 252761. The reversal of 252740 is 47252.

252740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 53824 + 198916 = 232^2 + 446^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 12637 = 252740 / (2 + 5 + 2 + 7 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6299 + ... + 6338.

It is an arithmetic number, because the mean of its divisors is an integer number (44233).

2²⁵²⁷⁴⁰ is an apocalyptic number.

252740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252740 is an abundant number, since it is smaller than the sum of its proper divisors (278056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252740 is a wasteful number, since it uses less digits than its factorization.

252740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12646 (or 12644 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 252740 is about 502.7325332620. The cubic root of 252740 is about 63.2253623571.

Adding to 252740 its reverse (47252), we get a palindrome (299992).

The spelling of 252740 in words is "two hundred fifty-two thousand, seven hundred forty".