1243115200 has 42 divisors (see below), whose sum is σ = 3058844276. Its totient is φ = 497245440.

The previous prime is 1243115143. The next prime is 1243115207. The reversal of 1243115200 is 25113421.

It is not an unprimeable number, because it can be changed into a prime (1243115207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 386874 + ... + 390073.

Almost surely, 2^1243115200 is an apocalyptic number.

1243115200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243115200 is an abundant number, since it is smaller than the sum of its proper divisors (1815729076).

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

1243115200 is an equidigital number, since it uses as much as digits as its factorization.

1243115200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776969 (or 776954 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1243115200 is about 35257.8388447165. The cubic root of 1243115200 is about 1075.2359892940.

Adding to 1243115200 its reverse (25113421), we get a palindrome (1268228621).

The spelling of 1243115200 in words is "one billion, two hundred forty-three million, one hundred fifteen thousand, two hundred".