1131598 has 16 divisors (see below), whose sum is σ = 1856736. Its totient is φ = 514080.

The previous prime is 1131569. The next prime is 1131617. The reversal of 1131598 is 8951311.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1540 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (116046).

2^1131598 is an apocalyptic number.

1131598 is a deficient number, since it is larger than the sum of its proper divisors (725138).

1131598 is a wasteful number, since it uses less digits than its factorization.

1131598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699.

The product of its digits is 1080, while the sum is 28.

The square root of 1131598 is about 1063.7659517018. The cubic root of 1131598 is about 104.2071192928.

It can be divided in two parts, 113 and 1598, that added together give a triangular number (1711 = T₅₈).

The spelling of 1131598 in words is "one million, one hundred thirty-one thousand, five hundred ninety-eight".