1115771 has 2 divisors, whose sum is σ = 1115772. Its totient is φ = 1115770.

The previous prime is 1115767. The next prime is 1115773. The reversal of 1115771 is 1775111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1115771 - 2² = 1115767 is a prime.

Together with 1115773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1115773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557885 + 557886.

It is an arithmetic number, because the mean of its divisors is an integer number (557886).

2^1115771 is an apocalyptic number.

1115771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115771 is an equidigital number, since it uses as much as digits as its factorization.

1115771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 245, while the sum is 23.

The square root of 1115771 is about 1056.3006200888. The cubic root of 1115771 is about 103.7190085011.

The spelling of 1115771 in words is "one million, one hundred fifteen thousand, seven hundred seventy-one".