1140820 has 12 divisors (see below), whose sum is σ = 2395764. Its totient is φ = 456320.

The previous prime is 1140803. The next prime is 1140847. The reversal of 1140820 is 280411.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 715716 = 652^2 + 846^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1140794 and 1140803.

It is a congruent number.

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, 28501 + ... + 28540.

It is an arithmetic number, because the mean of its divisors is an integer number (199647).

2^1140820 is an apocalyptic number.

1140820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1140820 is an abundant number, since it is smaller than the sum of its proper divisors (1254944).

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

1140820 is a wasteful number, since it uses less digits than its factorization.

1140820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57050 (or 57048 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1140820 is about 1068.0917563580. The cubic root of 1140820 is about 104.4894336973.

The spelling of 1140820 in words is "one million, one hundred forty thousand, eight hundred twenty".