1155109 has 4 divisors (see below), whose sum is σ = 1182016. Its totient is φ = 1128204.

The previous prime is 1155107. The next prime is 1155127. The reversal of 1155109 is 9015511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1155109 - 2¹ = 1155107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155101) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13389 + ... + 13474.

It is an arithmetic number, because the mean of its divisors is an integer number (295504).

2^1155109 is an apocalyptic number.

It is an amenable number.

1155109 is a deficient number, since it is larger than the sum of its proper divisors (26907).

1155109 is an equidigital number, since it uses as much as digits as its factorization.

1155109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26906.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1155109 is about 1074.7599732033. The cubic root of 1155109 is about 104.9238752842.

The spelling of 1155109 in words is "one million, one hundred fifty-five thousand, one hundred nine".