1180555 has 4 divisors (see below), whose sum is σ = 1416672. Its totient is φ = 944440.

The previous prime is 1180549. The next prime is 1180577. The reversal of 1180555 is 5550811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5550811 = 7 ⋅792973.

It is not a de Polignac number, because 1180555 - 2³ = 1180547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118051 + ... + 118060.

It is an arithmetic number, because the mean of its divisors is an integer number (354168).

2^1180555 is an apocalyptic number.

1180555 is a deficient number, since it is larger than the sum of its proper divisors (236117).

1180555 is an equidigital number, since it uses as much as digits as its factorization.

1180555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236116.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1180555 is about 1086.5334785454. The cubic root of 1180555 is about 105.6887451778.

The spelling of 1180555 in words is "one million, one hundred eighty thousand, five hundred fifty-five".