1115831 has 2 divisors, whose sum is σ = 1115832. Its totient is φ = 1115830.

The previous prime is 1115789. The next prime is 1115839. The reversal of 1115831 is 1385111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1115831 - 2⁶ = 1115767 is a prime.

It is a super-2 number, since 2×1115831² = 2490157641122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557915 + 557916.

It is an arithmetic number, because the mean of its divisors is an integer number (557916).

2^1115831 is an apocalyptic number.

1115831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115831 is an equidigital number, since it uses as much as digits as its factorization.

1115831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 20.

The square root of 1115831 is about 1056.3290207128. The cubic root of 1115831 is about 103.7208676129.

The spelling of 1115831 in words is "one million, one hundred fifteen thousand, eight hundred thirty-one".