1155155 has 4 divisors (see below), whose sum is σ = 1386192. Its totient is φ = 924120.

The previous prime is 1155151. The next prime is 1155169. The reversal of 1155155 is 5515511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5515511 = 1213 ⋅4547.

It is not a de Polignac number, because 1155155 - 2² = 1155151 is a prime.

It is a nude number because it is divisible by every one of its digits.

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 1155155.

It is not an unprimeable number, because it can be changed into a prime (1155151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115511 + ... + 115520.

It is an arithmetic number, because the mean of its divisors is an integer number (346548).

2^1155155 is an apocalyptic number.

1155155 is a deficient number, since it is larger than the sum of its proper divisors (231037).

1155155 is an equidigital number, since it uses as much as digits as its factorization.

1155155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231036.

The product of its digits is 625, while the sum is 23.

The square root of 1155155 is about 1074.7813731173. The cubic root of 1155155 is about 104.9252680631.

The spelling of 1155155 in words is "one million, one hundred fifty-five thousand, one hundred fifty-five".