491570252 has 12 divisors (see below), whose sum is σ = 861262416. Its totient is φ = 245495280.

The previous prime is 491570207. The next prime is 491570257. The reversal of 491570252 is 252075194.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (491570257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68624 + ... + 75447.

It is an arithmetic number, because the mean of its divisors is an integer number (71771868).

Almost surely, 2^491570252 is an apocalyptic number.

It is an amenable number.

491570252 is a deficient number, since it is larger than the sum of its proper divisors (369692164).

491570252 is a wasteful number, since it uses less digits than its factorization.

491570252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144928 (or 144926 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 491570252 is about 22171.3836284522. The cubic root of 491570252 is about 789.2147578539.

The spelling of 491570252 in words is "four hundred ninety-one million, five hundred seventy thousand, two hundred fifty-two".