491910242 has 8 divisors (see below), whose sum is σ = 744635100. Its totient is φ = 243698544.

The previous prime is 491910233. The next prime is 491910253. The reversal of 491910242 is 242019194.

It can be written as a sum of positive squares in 2 ways, for example, as 458859241 + 33051001 = 21421^2 + 5749^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 491910199 and 491910208.

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, 1128017 + ... + 1128452.

Almost surely, 2^491910242 is an apocalyptic number.

491910242 is a deficient number, since it is larger than the sum of its proper divisors (252724858).

491910242 is a wasteful number, since it uses less digits than its factorization.

491910242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256580.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 491910242 is about 22179.0496189535. The cubic root of 491910242 is about 789.3966669412.

The spelling of 491910242 in words is "four hundred ninety-one million, nine hundred ten thousand, two hundred forty-two".