252640 has 24 divisors (see below), whose sum is σ = 597240. Its totient is φ = 100992.

The previous prime is 252617. The next prime is 252641. The reversal of 252640 is 46252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252641) 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, 630 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (24885).

2²⁵²⁶⁴⁰ is an apocalyptic number.

252640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252640 is an abundant number, since it is smaller than the sum of its proper divisors (344600).

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

252640 is a wasteful number, since it uses less digits than its factorization.

252640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 252640 is about 502.6330669584. The cubic root of 252640 is about 63.2170226005.

Adding to 252640 its reverse (46252), we get a palindrome (298892).

The spelling of 252640 in words is "two hundred fifty-two thousand, six hundred forty".