1159820 has 12 divisors (see below), whose sum is σ = 2435664. Its totient is φ = 463920.

The previous prime is 1159813. The next prime is 1159843. The reversal of 1159820 is 289511.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1159820.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28976 + ... + 29015.

It is an arithmetic number, because the mean of its divisors is an integer number (202972).

2^1159820 is an apocalyptic number.

1159820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1159820 is an abundant number, since it is smaller than the sum of its proper divisors (1275844).

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

1159820 is a wasteful number, since it uses less digits than its factorization.

1159820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58000 (or 57998 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1159820 is about 1076.9493952828. The cubic root of 1159820 is about 105.0663224227.

The spelling of 1159820 in words is "one million, one hundred fifty-nine thousand, eight hundred twenty".