1155001 has 2 divisors, whose sum is σ = 1155002. Its totient is φ = 1155000.

The previous prime is 1154987. The next prime is 1155017. The reversal of 1155001 is 1005511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 389376 = 875^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155001 - 2⁵ = 1154969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1155061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577500 + 577501.

It is an arithmetic number, because the mean of its divisors is an integer number (577501).

2^1155001 is an apocalyptic number.

It is an amenable number.

1155001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155001 is an equidigital number, since it uses as much as digits as its factorization.

1155001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 1155001 is about 1074.7097282522. The cubic root of 1155001 is about 104.9206051363.

The spelling of 1155001 in words is "one million, one hundred fifty-five thousand, one".