1180155 has 16 divisors (see below), whose sum is σ = 1954080. Its totient is φ = 607488.

The previous prime is 1180141. The next prime is 1180159. The reversal of 1180155 is 5510811.

It is not a de Polignac number, because 1180155 - 2⁷ = 1180027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1180159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922 + ... + 1791.

It is an arithmetic number, because the mean of its divisors is an integer number (122130).

2^1180155 is an apocalyptic number.

1180155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1180155 is a deficient number, since it is larger than the sum of its proper divisors (773925).

1180155 is a wasteful number, since it uses less digits than its factorization.

1180155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 1180155 is about 1086.3493913102. The cubic root of 1180155 is about 105.6768072126.

Adding to 1180155 its reverse (5510811), we get a palindrome (6690966).

The spelling of 1180155 in words is "one million, one hundred eighty thousand, one hundred fifty-five".