1213612743 has 12 divisors (see below), whose sum is σ = 1882338360. Its totient is φ = 693492912.

The previous prime is 1213612679. The next prime is 1213612759. The reversal of 1213612743 is 3472163121.

It is a happy number.

It is not a de Polignac number, because 1213612743 - 2⁶ = 1213612679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213612743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213612243) 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 11 ways as a sum of consecutive naturals, for example, 4127788 + ... + 4128081.

It is an arithmetic number, because the mean of its divisors is an integer number (156861530).

Almost surely, 2^1213612743 is an apocalyptic number.

1213612743 is a deficient number, since it is larger than the sum of its proper divisors (668725617).

1213612743 is an equidigital number, since it uses as much as digits as its factorization.

1213612743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8255886 (or 8255879 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 1213612743 is about 34836.9450870767. The cubic root of 1213612743 is about 1066.6617193889.

Adding to 1213612743 its reverse (3472163121), we get a palindrome (4685775864).

The spelling of 1213612743 in words is "one billion, two hundred thirteen million, six hundred twelve thousand, seven hundred forty-three".