1591443042 has 16 divisors (see below), whose sum is σ = 3637584192. Its totient is φ = 454698000.

The previous prime is 1591443041. The next prime is 1591443047. The reversal of 1591443042 is 2403441951.

It is a junction number, because it is equal to n+sod(n) for n = 1591442994 and 1591443012.

It is not an unprimeable number, because it can be changed into a prime (1591443041) 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, 18945709 + ... + 18945792.

It is an arithmetic number, because the mean of its divisors is an integer number (227349012).

Almost surely, 2^1591443042 is an apocalyptic number.

1591443042 is an abundant number, since it is smaller than the sum of its proper divisors (2046141150).

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

1591443042 is a wasteful number, since it uses less digits than its factorization.

1591443042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37891513.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1591443042 is about 39892.8946304978. The cubic root of 1591443042 is about 1167.5183090881.

Adding to 1591443042 its reverse (2403441951), we get a palindrome (3994884993).

The spelling of 1591443042 in words is "one billion, five hundred ninety-one million, four hundred forty-three thousand, forty-two".