1212402443 has 8 divisors (see below), whose sum is σ = 1413880800. Its totient is φ = 1039201800.

The previous prime is 1212402409. The next prime is 1212402479. The reversal of 1212402443 is 3442042121.

It is a de Polignac number, because none of the positive numbers 2^k-1212402443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212402403) 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 7 ways as a sum of consecutive naturals, for example, 1767008 + ... + 1767693.

It is an arithmetic number, because the mean of its divisors is an integer number (176735100).

Almost surely, 2^1212402443 is an apocalyptic number.

1212402443 is a deficient number, since it is larger than the sum of its proper divisors (201478357).

1212402443 is an frugal number, since it uses more digits than its factorization.

1212402443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534722 (or 3534708 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1212402443 is about 34819.5698278999. The cubic root of 1212402443 is about 1066.3070180845.

Adding to 1212402443 its reverse (3442042121), we get a palindrome (4654444564).

The spelling of 1212402443 in words is "one billion, two hundred twelve million, four hundred two thousand, four hundred forty-three".