1200022420 has 24 divisors (see below), whose sum is σ = 2543171400. Its totient is φ = 475604352.

The previous prime is 1200022393. The next prime is 1200022507. The reversal of 1200022420 is 242200021.

1200022420 is digitally balanced in base 6, 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 4 ways, for example, as 138956944 + 1061065476 = 11788^2 + 32574^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1200022420.

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, 273055 + ... + 277414.

It is an arithmetic number, because the mean of its divisors is an integer number (105965475).

Almost surely, 2^1200022420 is an apocalyptic number.

1200022420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200022420 is an abundant number, since it is smaller than the sum of its proper divisors (1343148980).

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

1200022420 is a wasteful number, since it uses less digits than its factorization.

1200022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550587 (or 550585 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1200022420 is about 34641.3397546919. The cubic root of 1200022420 is about 1062.6651871428.

Adding to 1200022420 its reverse (242200021), we get a palindrome (1442222441).

The spelling of 1200022420 in words is "one billion, two hundred million, twenty-two thousand, four hundred twenty".