1155601 has 2 divisors, whose sum is σ = 1155602. Its totient is φ = 1155600.

The previous prime is 1155577. The next prime is 1155607. The reversal of 1155601 is 1065511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 104976 = 1025^2 + 324^2 .

It is an emirp because it is prime and its reverse (1065511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155601 - 2⁵ = 1155569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577800 + 577801.

It is an arithmetic number, because the mean of its divisors is an integer number (577801).

2^1155601 is an apocalyptic number.

It is an amenable number.

1155601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155601 is an equidigital number, since it uses as much as digits as its factorization.

1155601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1155601 is about 1074.9888371513. The cubic root of 1155601 is about 104.9387700457.

The spelling of 1155601 in words is "one million, one hundred fifty-five thousand, six hundred one".