1324820 has 24 divisors (see below), whose sum is σ = 3179904. Its totient is φ = 454176.

The previous prime is 1324819. The next prime is 1324831. The reversal of 1324820 is 284231.

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 = 1324792 and 1324801.

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, 4592 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (132496).

2^1324820 is an apocalyptic number.

1324820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1324820 is an abundant number, since it is smaller than the sum of its proper divisors (1855084).

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

1324820 is a wasteful number, since it uses less digits than its factorization.

1324820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9479 (or 9477 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1324820 is about 1151.0082536628. The cubic root of 1324820 is about 109.8294878901.

The spelling of 1324820 in words is "one million, three hundred twenty-four thousand, eight hundred twenty".