1591010842 has 4 divisors (see below), whose sum is σ = 2386516266. Its totient is φ = 795505420.

The previous prime is 1591010801. The next prime is 1591010843. The reversal of 1591010842 is 2480101951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2480101951 = 809 ⋅3065639.

It can be written as a sum of positive squares in only one way, i.e., 1557959841 + 33051001 = 39471^2 + 5749^2 .

It is not an unprimeable number, because it can be changed into a prime (1591010843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397752709 + ... + 397752712.

Almost surely, 2^1591010842 is an apocalyptic number.

1591010842 is a deficient number, since it is larger than the sum of its proper divisors (795505424).

1591010842 is an equidigital number, since it uses as much as digits as its factorization.

1591010842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795505423.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1591010842 is about 39887.4772579064. The cubic root of 1591010842 is about 1167.4126089811.

The spelling of 1591010842 in words is "one billion, five hundred ninety-one million, ten thousand, eight hundred forty-two".