252491686 has 8 divisors (see below), whose sum is σ = 380721024. Its totient is φ = 125584680.

The previous prime is 252491669. The next prime is 252491689. The reversal of 252491686 is 686194252.

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 (252491689) 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, 330105 + ... + 330868.

It is an arithmetic number, because the mean of its divisors is an integer number (47590128).

Almost surely, 2^252491686 is an apocalyptic number.

252491686 is a deficient number, since it is larger than the sum of its proper divisors (128229338).

252491686 is a wasteful number, since it uses less digits than its factorization.

252491686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661166.

The product of its digits is 207360, while the sum is 43.

The square root of 252491686 is about 15889.9869729336. The cubic root of 252491686 is about 632.0464952040.

The spelling of 252491686 in words is "two hundred fifty-two million, four hundred ninety-one thousand, six hundred eighty-six".