1491712012 has 24 divisors (see below), whose sum is σ = 3113139456. Its totient is φ = 611509008.

The previous prime is 1491711973. The next prime is 1491712031. The reversal of 1491712012 is 2102171941.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1157518 + ... + 1158805.

It is an arithmetic number, because the mean of its divisors is an integer number (129714144).

Almost surely, 2^1491712012 is an apocalyptic number.

It is an amenable number.

1491712012 is an abundant number, since it is smaller than the sum of its proper divisors (1621427444).

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

1491712012 is a wasteful number, since it uses less digits than its factorization.

1491712012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316357 (or 2316355 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1491712012 is about 38622.6877883971. The cubic root of 1491712012 is about 1142.6020413627.

Adding to 1491712012 its reverse (2102171941), we get a palindrome (3593883953).

The spelling of 1491712012 in words is "one billion, four hundred ninety-one million, seven hundred twelve thousand, twelve".