1115381 has 2 divisors, whose sum is σ = 1115382. Its totient is φ = 1115380.

The previous prime is 1115363. The next prime is 1115399. The reversal of 1115381 is 1835111.

It is a balanced prime because it is at equal distance from previous prime (1115363) and next prime (1115399).

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 46225 = 1034^2 + 215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115381 is a prime.

It is a super-2 number, since 2×1115381² = 2488149550322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557690 + 557691.

It is an arithmetic number, because the mean of its divisors is an integer number (557691).

2^1115381 is an apocalyptic number.

It is an amenable number.

1115381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115381 is an equidigital number, since it uses as much as digits as its factorization.

1115381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1115381 is about 1056.1159974170. The cubic root of 1115381 is about 103.7069226498.

The spelling of 1115381 in words is "one million, one hundred fifteen thousand, three hundred eighty-one".