491217124 has 12 divisors (see below), whose sum is σ = 863321004. Its totient is φ = 244553984.

The previous prime is 491217113. The next prime is 491217149. The reversal of 491217124 is 421712194.

It can be written as a sum of positive squares in 2 ways, for example, as 145926400 + 345290724 = 12080^2 + 18582^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262597 + ... + 264460.

It is an arithmetic number, because the mean of its divisors is an integer number (71943417).

Almost surely, 2^491217124 is an apocalyptic number.

It is an amenable number.

491217124 is a deficient number, since it is larger than the sum of its proper divisors (372103880).

491217124 is a wasteful number, since it uses less digits than its factorization.

491217124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527294 (or 527292 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 491217124 is about 22163.4185991241. The cubic root of 491217124 is about 789.0257305552.

The spelling of 491217124 in words is "four hundred ninety-one million, two hundred seventeen thousand, one hundred twenty-four".