1243442200 has 192 divisors, whose sum is σ = 3882251520. Its totient is φ = 357696000.

The previous prime is 1243442183. The next prime is 1243442257. The reversal of 1243442200 is 22443421.

It is a happy number.

1243442200 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1243442200² = 3092297009481680000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 197095 + ... + 203305.

It is an arithmetic number, because the mean of its divisors is an integer number (20220060).

Almost surely, 2^1243442200 is an apocalyptic number.

1243442200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243442200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1941125760).

1243442200 is an abundant number, since it is smaller than the sum of its proper divisors (2638809320).

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

1243442200 is a wasteful number, since it uses less digits than its factorization.

1243442200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258 (or 6249 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1243442200 is about 35262.4758064433. The cubic root of 1243442200 is about 1075.3302608851.

Adding to 1243442200 its reverse (22443421), we get a palindrome (1265885621).

The spelling of 1243442200 in words is "one billion, two hundred forty-three million, four hundred forty-two thousand, two hundred".