1131659 has 4 divisors (see below), whose sum is σ = 1191240. Its totient is φ = 1072080.

The previous prime is 1131653. The next prime is 1131671. The reversal of 1131659 is 9561311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9561311 = 673 ⋅14207.

It is a cyclic number.

It is not a de Polignac number, because 1131659 - 2⁴ = 1131643 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1131653) 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, 29762 + ... + 29799.

It is an arithmetic number, because the mean of its divisors is an integer number (297810).

2^1131659 is an apocalyptic number.

1131659 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1131659 is a deficient number, since it is larger than the sum of its proper divisors (59581).

1131659 is an equidigital number, since it uses as much as digits as its factorization.

1131659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59580.

The product of its digits is 810, while the sum is 26.

The square root of 1131659 is about 1063.7946230359. The cubic root of 1131659 is about 104.2089917246.

The spelling of 1131659 in words is "one million, one hundred thirty-one thousand, six hundred fifty-nine".