1491859756 has 12 divisors (see below), whose sum is σ = 2629537960. Its totient is φ = 740563200.

The previous prime is 1491859723. The next prime is 1491859757. The reversal of 1491859756 is 6579581941.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1491859697 and 1491859706.

It is not an unprimeable number, because it can be changed into a prime (1491859757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1341045 + ... + 1342156.

Almost surely, 2^1491859756 is an apocalyptic number.

It is an amenable number.

1491859756 is a deficient number, since it is larger than the sum of its proper divisors (1137678204).

1491859756 is a wasteful number, since it uses less digits than its factorization.

1491859756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683344 (or 2683342 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 55.

The square root of 1491859756 is about 38624.6003992274. The cubic root of 1491859756 is about 1142.6397624558.

The spelling of 1491859756 in words is "one billion, four hundred ninety-one million, eight hundred fifty-nine thousand, seven hundred fifty-six".