1142831 has 4 divisors (see below), whose sum is σ = 1203000. Its totient is φ = 1082664.

The previous prime is 1142821. The next prime is 1142833. The reversal of 1142831 is 1382411.

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 1142831 - 2¹⁸ = 880687 is a prime.

It is a super-2 number, since 2×1142831² = 2612125389122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142833) 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, 30056 + ... + 30093.

It is an arithmetic number, because the mean of its divisors is an integer number (300750).

2^1142831 is an apocalyptic number.

1142831 is a deficient number, since it is larger than the sum of its proper divisors (60169).

1142831 is an equidigital number, since it uses as much as digits as its factorization.

1142831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60168.

The product of its digits is 192, while the sum is 20.

The square root of 1142831 is about 1069.0327403780. The cubic root of 1142831 is about 104.5507945030.

The spelling of 1142831 in words is "one million, one hundred forty-two thousand, eight hundred thirty-one".