1222042400 has 36 divisors (see below), whose sum is σ = 2983312962. Its totient is φ = 488816640.

The previous prime is 1222042363. The next prime is 1222042403. The reversal of 1222042400 is 42402221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 546250384 + 675792016 = 23372^2 + 25996^2 .

It is not an unprimeable number, because it can be changed into a prime (1222042403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 762977 + ... + 764576.

Almost surely, 2^1222042400 is an apocalyptic number.

1222042400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222042400 is an abundant number, since it is smaller than the sum of its proper divisors (1761270562).

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

1222042400 is a wasteful number, since it uses less digits than its factorization.

1222042400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527573 (or 1527560 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1222042400 is about 34957.7230379783. The cubic root of 1222042400 is about 1069.1256723404.

Adding to 1222042400 its reverse (42402221), we get a palindrome (1264444621).

The spelling of 1222042400 in words is "one billion, two hundred twenty-two million, forty-two thousand, four hundred".