1591126147 has 4 divisors (see below), whose sum is σ = 1713520480. Its totient is φ = 1468731816.

The previous prime is 1591126111. The next prime is 1591126171. The reversal of 1591126147 is 7416211951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1591126147 - 2¹¹ = 1591124099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1591123147) 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, 61197147 + ... + 61197172.

It is an arithmetic number, because the mean of its divisors is an integer number (428380120).

Almost surely, 2^1591126147 is an apocalyptic number.

1591126147 is a deficient number, since it is larger than the sum of its proper divisors (122394333).

1591126147 is a wasteful number, since it uses less digits than its factorization.

1591126147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122394332.

The product of its digits is 15120, while the sum is 37.

The square root of 1591126147 is about 39888.9226101684. The cubic root of 1591126147 is about 1167.4408101841.

The spelling of 1591126147 in words is "one billion, five hundred ninety-one million, one hundred twenty-six thousand, one hundred forty-seven".