1159831 has 4 divisors (see below), whose sum is σ = 1167664. Its totient is φ = 1152000.

The previous prime is 1159813. The next prime is 1159843. The reversal of 1159831 is 1389511.

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

It is a 10-Lehmer number, since φ(1159831) divides (1159831-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 1159831 - 2¹³ = 1151639 is a prime.

It is a super-2 number, since 2×1159831² = 2690415897122, which contains 22 as substring.

It is a Duffinian number.

1159831 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1159831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690 + ... + 3991.

It is an arithmetic number, because the mean of its divisors is an integer number (291916).

2^1159831 is an apocalyptic number.

1159831 is a deficient number, since it is larger than the sum of its proper divisors (7833).

1159831 is an equidigital number, since it uses as much as digits as its factorization.

1159831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832.

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

The square root of 1159831 is about 1076.9545022887. The cubic root of 1159831 is about 105.0666545793.

The spelling of 1159831 in words is "one million, one hundred fifty-nine thousand, eight hundred thirty-one".