1242313213 has 2 divisors, whose sum is σ = 1242313214. Its totient is φ = 1242313212.

The previous prime is 1242313201. The next prime is 1242313249. The reversal of 1242313213 is 3123132421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234679044 + 7634169 = 35138^2 + 2763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242313213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242313273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621156606 + 621156607.

It is an arithmetic number, because the mean of its divisors is an integer number (621156607).

Almost surely, 2^1242313213 is an apocalyptic number.

It is an amenable number.

1242313213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242313213 is an equidigital number, since it uses as much as digits as its factorization.

1242313213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 1242313213 is about 35246.4638368163. The cubic root of 1242313213 is about 1075.0047125807.

Adding to 1242313213 its reverse (3123132421), we get a palindrome (4365445634).

The spelling of 1242313213 in words is "one billion, two hundred forty-two million, three hundred thirteen thousand, two hundred thirteen".