1043820 has 48 divisors (see below), whose sum is σ = 3249120. Its totient is φ = 278208.

The previous prime is 1043773. The next prime is 1043831. The reversal of 1043820 is 283401.

It is a happy number.

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 = 1043793 and 1043802.

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, 427 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (67690).

2^1043820 is an apocalyptic number.

1043820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1043820 is an abundant number, since it is smaller than the sum of its proper divisors (2205300).

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

1043820 is a wasteful number, since it uses less digits than its factorization.

1043820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1043820 is about 1021.6750951256. The cubic root of 1043820 is about 101.4398358939.

The spelling of 1043820 in words is "one million, forty-three thousand, eight hundred twenty".