491001572 has 12 divisors (see below), whose sum is σ = 904476720. Its totient is φ = 232579656.

The previous prime is 491001569. The next prime is 491001659. The reversal of 491001572 is 275100194.

It is an unprimeable number.

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, 3230198 + ... + 3230349.

It is an arithmetic number, because the mean of its divisors is an integer number (75373060).

Almost surely, 2^491001572 is an apocalyptic number.

It is an amenable number.

491001572 is a deficient number, since it is larger than the sum of its proper divisors (413475148).

491001572 is a wasteful number, since it uses less digits than its factorization.

491001572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460570 (or 6460568 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 491001572 is about 22158.5552778154. Note that the first 3 decimals coincide. The cubic root of 491001572 is about 788.9103023334.

The spelling of 491001572 in words is "four hundred ninety-one million, one thousand, five hundred seventy-two".