1115857 has 2 divisors, whose sum is σ = 1115858. Its totient is φ = 1115856.

The previous prime is 1115843. The next prime is 1115879. The reversal of 1115857 is 7585111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 25921 = 1044^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115857 - 2¹¹ = 1113809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557928 + 557929.

It is an arithmetic number, because the mean of its divisors is an integer number (557929).

2^1115857 is an apocalyptic number.

It is an amenable number.

1115857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115857 is an equidigital number, since it uses as much as digits as its factorization.

1115857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 28.

The square root of 1115857 is about 1056.3413274127. The cubic root of 1115857 is about 103.7216732073.

The spelling of 1115857 in words is "one million, one hundred fifteen thousand, eight hundred fifty-seven".