1143831 has 16 divisors (see below), whose sum is σ = 1662080. Its totient is φ = 695520.

The previous prime is 1143829. The next prime is 1143851. The reversal of 1143831 is 1383411.

It is not a de Polignac number, because 1143831 - 2¹ = 1143829 is a prime.

It is a super-2 number, since 2×1143831² = 2616698713122, which contains 22 as substring.

It is the 1070-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143798 and 1143807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143851) by changing a digit.

It is a nontrivial repunit in base 1069.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5316 + ... + 5526.

It is an arithmetic number, because the mean of its divisors is an integer number (103880).

2^1143831 is an apocalyptic number.

1143831 is a deficient number, since it is larger than the sum of its proper divisors (518249).

1143831 is a wasteful number, since it uses less digits than its factorization.

1143831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366.

The product of its digits is 288, while the sum is 21.

The square root of 1143831 is about 1069.5003506311. The cubic root of 1143831 is about 104.5812802921.

The spelling of 1143831 in words is "one million, one hundred forty-three thousand, eight hundred thirty-one".