1243424200 has 96 divisors (see below), whose sum is σ = 3076309800. Its totient is φ = 465776640.

The previous prime is 1243424197. The next prime is 1243424219. The reversal of 1243424200 is 24243421.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 283787716 + 959636484 = 16846^2 + 30978^2 .

It is a super-2 number, since 2×1243424200² = 3092207482291280000, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 777802 + ... + 779398.

Almost surely, 2^1243424200 is an apocalyptic number.

1243424200 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 1243424200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538154900).

1243424200 is an abundant number, since it is smaller than the sum of its proper divisors (1832885600).

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

1243424200 is a wasteful number, since it uses less digits than its factorization.

1243424200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859 (or 1850 counting only the distinct ones).

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

The square root of 1243424200 is about 35262.2205767022. The cubic root of 1243424200 is about 1075.3250720531.

Adding to 1243424200 its reverse (24243421), we get a palindrome (1267667621).

The spelling of 1243424200 in words is "one billion, two hundred forty-three million, four hundred twenty-four thousand, two hundred".