1591598 has 4 divisors (see below), whose sum is σ = 2387400. Its totient is φ = 795798.

The previous prime is 1591589. The next prime is 1591621. The reversal of 1591598 is 8951951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8951951 = 1433 ⋅6247.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397898 + ... + 397901.

It is an arithmetic number, because the mean of its divisors is an integer number (596850).

2^1591598 is an apocalyptic number.

1591598 is a deficient number, since it is larger than the sum of its proper divisors (795802).

1591598 is an equidigital number, since it uses as much as digits as its factorization.

1591598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795801.

The product of its digits is 16200, while the sum is 38.

The square root of 1591598 is about 1261.5855103797. The cubic root of 1591598 is about 116.7556201413.

The spelling of 1591598 in words is "one million, five hundred ninety-one thousand, five hundred ninety-eight".