1155311 has 2 divisors, whose sum is σ = 1155312. Its totient is φ = 1155310.

The previous prime is 1155293. The next prime is 1155317. The reversal of 1155311 is 1135511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155311 - 2⁶ = 1155247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577655 + 577656.

It is an arithmetic number, because the mean of its divisors is an integer number (577656).

2^1155311 is an apocalyptic number.

1155311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155311 is an equidigital number, since it uses as much as digits as its factorization.

1155311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75, while the sum is 17.

The square root of 1155311 is about 1074.8539435663. The cubic root of 1155311 is about 104.9299911248.

The spelling of 1155311 in words is "one million, one hundred fifty-five thousand, three hundred eleven".