1491875139 has 8 divisors (see below), whose sum is σ = 1999474192. Its totient is φ = 989429760.

The previous prime is 1491875123. The next prime is 1491875167. The reversal of 1491875139 is 9315781941.

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

It is not a de Polignac number, because 1491875139 - 2⁴ = 1491875123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491175139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287742 + ... + 1288899.

It is an arithmetic number, because the mean of its divisors is an integer number (249934274).

Almost surely, 2^1491875139 is an apocalyptic number.

1491875139 is a deficient number, since it is larger than the sum of its proper divisors (507599053).

1491875139 is a wasteful number, since it uses less digits than its factorization.

1491875139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576837.

The product of its digits is 272160, while the sum is 48.

The square root of 1491875139 is about 38624.7995334604. The cubic root of 1491875139 is about 1142.6436898059.

The spelling of 1491875139 in words is "one billion, four hundred ninety-one million, eight hundred seventy-five thousand, one hundred thirty-nine".