1161831 has 32 divisors (see below), whose sum is σ = 1900800. Its totient is φ = 622080.

The previous prime is 1161829. The next prime is 1161833. The reversal of 1161831 is 1381611.

It is an interprime number because it is at equal distance from previous prime (1161829) and next prime (1161833).

It is not a de Polignac number, because 1161831 - 2¹ = 1161829 is a prime.

It is a super-2 number, since 2×1161831² = 2699702545122, which contains 22 as substring.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1161798 and 1161807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10605 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (59400).

2^1161831 is an apocalyptic number.

1161831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1161831 is a deficient number, since it is larger than the sum of its proper divisors (738969).

1161831 is a wasteful number, since it uses less digits than its factorization.

1161831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its digits is 144, while the sum is 21.

The square root of 1161831 is about 1077.8826466736. The cubic root of 1161831 is about 105.1270118328.

The spelling of 1161831 in words is "one million, one hundred sixty-one thousand, eight hundred thirty-one".