1243401212 has 12 divisors (see below), whose sum is σ = 2178983520. Its totient is φ = 620834496.

The previous prime is 1243401191. The next prime is 1243401217. The reversal of 1243401212 is 2121043421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243401217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213293 + ... + 219044.

It is an arithmetic number, because the mean of its divisors is an integer number (181581960).

Almost surely, 2^1243401212 is an apocalyptic number.

It is an amenable number.

1243401212 is a deficient number, since it is larger than the sum of its proper divisors (935582308).

1243401212 is a wasteful number, since it uses less digits than its factorization.

1243401212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433060 (or 433058 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1243401212 is about 35261.8946172777. The cubic root of 1243401212 is about 1075.3184452652.

Adding to 1243401212 its reverse (2121043421), we get a palindrome (3364444633).

The spelling of 1243401212 in words is "one billion, two hundred forty-three million, four hundred one thousand, two hundred twelve".