1491560420 has 48 divisors (see below), whose sum is σ = 3768159360. Its totient is φ = 484475904.

The previous prime is 1491560417. The next prime is 1491560437. The reversal of 1491560420 is 240651941.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277709 + ... + 283028.

It is an arithmetic number, because the mean of its divisors is an integer number (78503320).

Almost surely, 2^1491560420 is an apocalyptic number.

1491560420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491560420 is an abundant number, since it is smaller than the sum of its proper divisors (2276598940).

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

1491560420 is a wasteful number, since it uses less digits than its factorization.

1491560420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560772 (or 560770 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1491560420 is about 38620.7252650698. The cubic root of 1491560420 is about 1142.5633352328.

The spelling of 1491560420 in words is "one billion, four hundred ninety-one million, five hundred sixty thousand, four hundred twenty".