1200020 has 24 divisors (see below), whose sum is σ = 2608200. Its totient is φ = 463232.

The previous prime is 1200007. The next prime is 1200061. The reversal of 1200020 is 200021.

It can be written as a sum of positive squares in 4 ways, for example, as 24964 + 1175056 = 158^2 + 1084^2 .

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

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1199977 and 1200013.

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, 455 + ... + 1614.

It is an arithmetic number, because the mean of its divisors is an integer number (108675).

2^1200020 is an apocalyptic number.

1200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200020 is an abundant number, since it is smaller than the sum of its proper divisors (1408180).

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

1200020 is a wasteful number, since it uses less digits than its factorization.

1200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2105 counting only the distinct ones).

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

The square root of 1200020 is about 1095.4542436816. The cubic root of 1200020 is about 106.2664472809.

Adding to 1200020 its reverse (200021), we get a palindrome (1400041).

Subtracting from 1200020 its reverse (200021), we obtain a palindrome (999999).

The spelling of 1200020 in words is "one million, two hundred thousand, twenty".