1020020 has 12 divisors (see below), whose sum is σ = 2142084. Its totient is φ = 408000.

The previous prime is 1020013. The next prime is 1020023. The reversal of 1020020 is 200201.

1020020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 414736 = 778^2 + 644^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1019986 and 1020013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25481 + ... + 25520.

It is an arithmetic number, because the mean of its divisors is an integer number (178507).

2^1020020 is an apocalyptic number.

1020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020020 is an abundant number, since it is smaller than the sum of its proper divisors (1122064).

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

1020020 is a wasteful number, since it uses less digits than its factorization.

1020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51010 (or 51008 counting only the distinct ones).

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

The square root of 1020020 is about 1009.9603952631. The cubic root of 1020020 is about 100.6629288751.

Adding to 1020020 its reverse (200201), we get a palindrome (1220221).

The spelling of 1020020 in words is "one million, twenty thousand, twenty".