1135820 has 72 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 362880.

The previous prime is 1135819. The next prime is 1135831. The reversal of 1135820 is 285311.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1135792 and 1135801.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18590 + ... + 18650.

It is an arithmetic number, because the mean of its divisors is an integer number (41230).

2^1135820 is an apocalyptic number.

1135820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1135820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484280).

1135820 is an abundant number, since it is smaller than the sum of its proper divisors (1832740).

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

1135820 is a wasteful number, since it uses less digits than its factorization.

1135820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1135820 is about 1065.7485632174. The cubic root of 1135820 is about 104.3365576097.

The spelling of 1135820 in words is "one million, one hundred thirty-five thousand, eight hundred twenty".