1491331146 has 8 divisors (see below), whose sum is σ = 2982662304. Its totient is φ = 497110380.

The previous prime is 1491331123. The next prime is 1491331151. The reversal of 1491331146 is 6411331941.

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

1491331146 is an admirable number.

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, 124277590 + ... + 124277601.

It is an arithmetic number, because the mean of its divisors is an integer number (372832788).

Almost surely, 2^1491331146 is an apocalyptic number.

1491331146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491331146 is a wasteful number, since it uses less digits than its factorization.

1491331146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248555196.

The product of its digits is 7776, while the sum is 33.

The square root of 1491331146 is about 38617.7568742671. The cubic root of 1491331146 is about 1142.5047895009.

The spelling of 1491331146 in words is "one billion, four hundred ninety-one million, three hundred thirty-one thousand, one hundred forty-six".