1124820 has 48 divisors (see below), whose sum is σ = 3501120. Its totient is φ = 299808.

The previous prime is 1124813. The next prime is 1124831. The reversal of 1124820 is 284211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1124793 and 1124802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (72940).

2^1124820 is an apocalyptic number.

1124820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1124820 is an abundant number, since it is smaller than the sum of its proper divisors (2376300).

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

1124820 is a wasteful number, since it uses less digits than its factorization.

1124820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101 (or 2093 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1124820 is about 1060.5753155717. The cubic root of 1124820 is about 103.9986439665.

The spelling of 1124820 in words is "one million, one hundred twenty-four thousand, eight hundred twenty".