252139726 has 8 divisors (see below), whose sum is σ = 378413640. Its totient is φ = 126001848.

The previous prime is 252139721. The next prime is 252139739. The reversal of 252139726 is 627931252.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252139721) 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, 29241 + ... + 36868.

It is an arithmetic number, because the mean of its divisors is an integer number (47301705).

Almost surely, 2^252139726 is an apocalyptic number.

252139726 is a deficient number, since it is larger than the sum of its proper divisors (126273914).

252139726 is a wasteful number, since it uses less digits than its factorization.

252139726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68018.

The product of its digits is 45360, while the sum is 37.

The square root of 252139726 is about 15878.9082118387. The cubic root of 252139726 is about 631.7526788919.

The spelling of 252139726 in words is "two hundred fifty-two million, one hundred thirty-nine thousand, seven hundred twenty-six".