1491039043 has 16 divisors (see below), whose sum is σ = 1728076896. Its totient is φ = 1274135040.

The previous prime is 1491039037. The next prime is 1491039071. The reversal of 1491039043 is 3409301941.

It is a de Polignac number, because none of the positive numbers 2^k-1491039043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1491039083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41821 + ... + 68782.

It is an arithmetic number, because the mean of its divisors is an integer number (108004806).

Almost surely, 2^1491039043 is an apocalyptic number.

1491039043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1491039043 is a deficient number, since it is larger than the sum of its proper divisors (237037853).

1491039043 is a wasteful number, since it uses less digits than its factorization.

1491039043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110694.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1491039043 is about 38613.9747112363. The cubic root of 1491039043 is about 1142.4301915221.

The spelling of 1491039043 in words is "one billion, four hundred ninety-one million, thirty-nine thousand, forty-three".