1155555 has 12 divisors (see below), whose sum is σ = 2003040. Its totient is φ = 616272.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155555 is 5555511.

It is not a de Polignac number, because 1155555 - 2²⁰ = 106979 is a prime.

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

1155555 is a modest number, since divided by 5555 gives 115 as remainder.

1155555 is a lucky number.

It is a plaindrome in base 10.

It is a zygodrome in base 10 and base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12795 + ... + 12884.

It is an arithmetic number, because the mean of its divisors is an integer number (166920).

2^1155555 is an apocalyptic number.

1155555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155555 is a deficient number, since it is larger than the sum of its proper divisors (847485).

1155555 is a wasteful number, since it uses less digits than its factorization.

1155555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25690 (or 25687 counting only the distinct ones).

The product of its digits is 3125, while the sum is 27.

The square root of 1155555 is about 1074.9674413674. The cubic root of 1155555 is about 104.9373776252.

It can be divided in two parts, 115555 and 5, that multiplied together give a palindrome (577775).

The spelling of 1155555 in words is "one million, one hundred fifty-five thousand, five hundred fifty-five".