1131559 has 16 divisors (see below), whose sum is σ = 1368864. Its totient is φ = 921600.

The previous prime is 1131553. The next prime is 1131569. The reversal of 1131559 is 9551311.

It is a cyclic number.

It is not a de Polignac number, because 1131559 - 2⁹ = 1131047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5767 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (85554).

2^1131559 is an apocalyptic number.

1131559 is a deficient number, since it is larger than the sum of its proper divisors (237305).

1131559 is a wasteful number, since it uses less digits than its factorization.

1131559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258.

The product of its digits is 675, while the sum is 25.

The square root of 1131559 is about 1063.7476204439. The cubic root of 1131559 is about 104.2059221291.

The spelling of 1131559 in words is "one million, one hundred thirty-one thousand, five hundred fifty-nine".