1230605213 has 2 divisors, whose sum is σ = 1230605214. Its totient is φ = 1230605212.

The previous prime is 1230605209. The next prime is 1230605263. The reversal of 1230605213 is 3125060321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1230466084 + 139129 = 35078^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230605213 - 2² = 1230605209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230605203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615302606 + 615302607.

It is an arithmetic number, because the mean of its divisors is an integer number (615302607).

Almost surely, 2^1230605213 is an apocalyptic number.

It is an amenable number.

1230605213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230605213 is an equidigital number, since it uses as much as digits as its factorization.

1230605213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1230605213 is about 35079.9830815239. The cubic root of 1230605213 is about 1071.6169726336.

Adding to 1230605213 its reverse (3125060321), we get a palindrome (4355665534).

The spelling of 1230605213 in words is "one billion, two hundred thirty million, six hundred five thousand, two hundred thirteen".