1155863 has 2 divisors, whose sum is σ = 1155864. Its totient is φ = 1155862.

The previous prime is 1155859. The next prime is 1155899. The reversal of 1155863 is 3685511.

It is a weak prime.

It is an emirp because it is prime and its reverse (3685511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155863 - 2² = 1155859 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577931 + 577932.

It is an arithmetic number, because the mean of its divisors is an integer number (577932).

2^1155863 is an apocalyptic number.

1155863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155863 is an equidigital number, since it uses as much as digits as its factorization.

1155863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 1155863 is about 1075.1106919755. The cubic root of 1155863 is about 104.9467000839.

The spelling of 1155863 in words is "one million, one hundred fifty-five thousand, eight hundred sixty-three".