252729385 has 8 divisors (see below), whose sum is σ = 303372936. Its totient is φ = 202118400.

The previous prime is 252729377. The next prime is 252729401. The reversal of 252729385 is 583927252.

It can be written as a sum of positive squares in 4 ways, for example, as 169208064 + 83521321 = 13008^2 + 9139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252729385 - 2³ = 252729377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14835 + ... + 26935.

It is an arithmetic number, because the mean of its divisors is an integer number (37921617).

Almost surely, 2^252729385 is an apocalyptic number.

It is an amenable number.

252729385 is a deficient number, since it is larger than the sum of its proper divisors (50643551).

252729385 is a wasteful number, since it uses less digits than its factorization.

252729385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16283.

The product of its digits is 302400, while the sum is 43.

The square root of 252729385 is about 15897.4647349821. The cubic root of 252729385 is about 632.2447719630.

The spelling of 252729385 in words is "two hundred fifty-two million, seven hundred twenty-nine thousand, three hundred eighty-five".