1212345539 has 2 divisors, whose sum is σ = 1212345540. Its totient is φ = 1212345538.

The previous prime is 1212345517. The next prime is 1212345553. The reversal of 1212345539 is 9355432121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212345539 - 2⁸ = 1212345283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212345499 and 1212345508.

It is not a weakly prime, because it can be changed into another prime (1212345509) 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 as a sum of consecutive naturals, namely, 606172769 + 606172770.

It is an arithmetic number, because the mean of its divisors is an integer number (606172770).

Almost surely, 2^1212345539 is an apocalyptic number.

1212345539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212345539 is an equidigital number, since it uses as much as digits as its factorization.

1212345539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 1212345539 is about 34818.7526916172. The cubic root of 1212345539 is about 1066.2903354820.

The spelling of 1212345539 in words is "one billion, two hundred twelve million, three hundred forty-five thousand, five hundred thirty-nine".