1121831 has 2 divisors, whose sum is σ = 1121832. Its totient is φ = 1121830.

The previous prime is 1121819. The next prime is 1121833. The reversal of 1121831 is 1381211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121831 - 2¹⁰ = 1120807 is a prime.

It is a super-2 number, since 2×1121831² = 2517009585122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1121833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560915 + 560916.

It is an arithmetic number, because the mean of its divisors is an integer number (560916).

2^1121831 is an apocalyptic number.

1121831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121831 is an equidigital number, since it uses as much as digits as its factorization.

1121831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 17.

The square root of 1121831 is about 1059.1652373450. The cubic root of 1121831 is about 103.9064432299.

The spelling of 1121831 in words is "one million, one hundred twenty-one thousand, eight hundred thirty-one".