1155550 has 36 divisors (see below), whose sum is σ = 2374848. Its totient is φ = 418000.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155550 is 555511.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5955 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (65968).

2^1155550 is an apocalyptic number.

1155550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155550 is an abundant number, since it is smaller than the sum of its proper divisors (1219298).

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

1155550 is a wasteful number, since it uses less digits than its factorization.

1155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 1155550 is about 1074.9651157131. The cubic root of 1155550 is about 104.9372262729.

1155550 divided by its sum of digits (22) gives a palindrome (52525).

It can be divided in two parts, 115 and 5550, that added together give a palindrome (5665).

The spelling of 1155550 in words is "one million, one hundred fifty-five thousand, five hundred fifty".