1131859 has 4 divisors (see below), whose sum is σ = 1136016. Its totient is φ = 1127704.

The previous prime is 1131857. The next prime is 1131863. The reversal of 1131859 is 9581311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131859 - 2¹ = 1131857 is a prime.

It is a super-2 number, since 2×1131859² = 2562209591762, which contains 22 as substring.

It is a Duffinian number.

1131859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1131857) 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, 1639 + ... + 2224.

It is an arithmetic number, because the mean of its divisors is an integer number (284004).

2^1131859 is an apocalyptic number.

1131859 is a deficient number, since it is larger than the sum of its proper divisors (4157).

1131859 is an equidigital number, since it uses as much as digits as its factorization.

1131859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156.

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

The square root of 1131859 is about 1063.8886219901. Note that the first 3 decimals coincide. The cubic root of 1131859 is about 104.2151303731.

The spelling of 1131859 in words is "one million, one hundred thirty-one thousand, eight hundred fifty-nine".