491021450 has 24 divisors (see below), whose sum is σ = 937987212. Its totient is φ = 191099520.

The previous prime is 491021449. The next prime is 491021467. The reversal of 491021450 is 54120194.

It can be written as a sum of positive squares in 6 ways, for example, as 327718609 + 163302841 = 18103^2 + 12779^2 .

It is a super-2 number, since 2×491021450² = 482204128720205000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130859 + ... + 134558.

Almost surely, 2^491021450 is an apocalyptic number.

491021450 is a deficient number, since it is larger than the sum of its proper divisors (446965762).

491021450 is a wasteful number, since it uses less digits than its factorization.

491021450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265466 (or 265461 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 491021450 is about 22159.0038133486. The cubic root of 491021450 is about 788.9209484278.

The spelling of 491021450 in words is "four hundred ninety-one million, twenty-one thousand, four hundred fifty".