1109550 has 48 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 272640.

The previous prime is 1109533. The next prime is 1109561. The reversal of 1109550 is 559011.

It is a happy number.

It is a super-2 number, since 2×1109550² = 2462202405000, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 1666 + ... + 2234.

It is an arithmetic number, because the mean of its divisors is an integer number (61845).

2^1109550 is an apocalyptic number.

1109550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1109550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484280).

1109550 is an abundant number, since it is smaller than the sum of its proper divisors (1859010).

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

1109550 is a wasteful number, since it uses less digits than its factorization.

1109550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 1109550 is about 1053.3517930872. The cubic root of 1109550 is about 103.5258867779.

The spelling of 1109550 in words is "one million, one hundred nine thousand, five hundred fifty".