1155500 has 24 divisors (see below), whose sum is σ = 2524704. Its totient is φ = 462000.

The previous prime is 1155499. The next prime is 1155527. The reversal of 1155500 is 55511.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656 + ... + 1655.

It is an arithmetic number, because the mean of its divisors is an integer number (105196).

2^1155500 is an apocalyptic number.

1155500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155500 is an abundant number, since it is smaller than the sum of its proper divisors (1369204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155500 is a wasteful number, since it uses less digits than its factorization.

1155500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 1155500 is about 1074.9418588928. The cubic root of 1155500 is about 104.9357127261.

Adding to 1155500 its product of nonzero digits (125), we get a square (1155625 = 1075²).

The spelling of 1155500 in words is "one million, one hundred fifty-five thousand, five hundred".