1136820 has 24 divisors (see below), whose sum is σ = 3183264. Its totient is φ = 303136.

The previous prime is 1136819. The next prime is 1136831. The reversal of 1136820 is 286311.

It is a congruent number.

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, 9414 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (132636).

2^1136820 is an apocalyptic number.

1136820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1136820 is an abundant number, since it is smaller than the sum of its proper divisors (2046444).

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

1136820 is a wasteful number, since it uses less digits than its factorization.

1136820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18959 (or 18957 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1136820 is about 1066.2176138106. The cubic root of 1136820 is about 104.3671686667.

The spelling of 1136820 in words is "one million, one hundred thirty-six thousand, eight hundred twenty".