1121790 has 32 divisors (see below), whose sum is σ = 2740896. Its totient is φ = 293760.

The previous prime is 1121737. The next prime is 1121819. The reversal of 1121790 is 971211.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1524 + ... + 2136.

It is an arithmetic number, because the mean of its divisors is an integer number (85653).

2^1121790 is an apocalyptic number.

1121790 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 1121790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370448).

1121790 is an abundant number, since it is smaller than the sum of its proper divisors (1619106).

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

1121790 is a wasteful number, since it uses less digits than its factorization.

1121790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 1121790 is about 1059.1458823033. The cubic root of 1121790 is about 103.9051773779.

The spelling of 1121790 in words is "one million, one hundred twenty-one thousand, seven hundred ninety".