1115731 has 2 divisors, whose sum is σ = 1115732. Its totient is φ = 1115730.

The previous prime is 1115713. The next prime is 1115743. The reversal of 1115731 is 1375111.

Together with previous prime (1115713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1375111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115731 - 2¹⁹ = 591443 is a prime.

It is a super-2 number, since 2×1115731² = 2489711328722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1115699 and 1115708.

It is not a weakly prime, because it can be changed into another prime (1115701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557865 + 557866.

It is an arithmetic number, because the mean of its divisors is an integer number (557866).

2^1115731 is an apocalyptic number.

1115731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115731 is an equidigital number, since it uses as much as digits as its factorization.

1115731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105, while the sum is 19.

The square root of 1115731 is about 1056.2816859153. The cubic root of 1115731 is about 103.7177690563.

The spelling of 1115731 in words is "one million, one hundred fifteen thousand, seven hundred thirty-one".