252745720 has 32 divisors (see below), whose sum is σ = 572508000. Its totient is φ = 100417408.

The previous prime is 252745709. The next prime is 252745723. The reversal of 252745720 is 27547252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252745723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15244 + ... + 27163.

It is an arithmetic number, because the mean of its divisors is an integer number (17890875).

Almost surely, 2^252745720 is an apocalyptic number.

252745720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252745720 is an abundant number, since it is smaller than the sum of its proper divisors (319762280).

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

252745720 is a wasteful number, since it uses less digits than its factorization.

252745720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42567 (or 42563 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 252745720 is about 15897.9784878456. The cubic root of 252745720 is about 632.2583932466.

The spelling of 252745720 in words is "two hundred fifty-two million, seven hundred forty-five thousand, seven hundred twenty".