1002020 has 12 divisors (see below), whose sum is σ = 2104284. Its totient is φ = 400800.

The previous prime is 1002017. The next prime is 1002049. The reversal of 1002020 is 202001.

It can be written as a sum of positive squares in 2 ways, for example, as 238144 + 763876 = 488^2 + 874^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

1002020 is a modest number, since divided by 2020 gives 100 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1001995 and 1002013.

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, 25031 + ... + 25070.

It is an arithmetic number, because the mean of its divisors is an integer number (175357).

2^1002020 is an apocalyptic number.

1002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002020 is an abundant number, since it is smaller than the sum of its proper divisors (1102264).

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

1002020 is a wasteful number, since it uses less digits than its factorization.

1002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50110 (or 50108 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 1002020 is about 1001.0094904645. The cubic root of 1002020 is about 100.0672880464.

Adding to 1002020 its reverse (202001), we get a palindrome (1204021).

The spelling of 1002020 in words is "one million, two thousand, twenty".