1200420012439 has 2 divisors, whose sum is σ = 1200420012440. Its totient is φ = 1200420012438.

The previous prime is 1200420012413. The next prime is 1200420012461. The reversal of 1200420012439 is 9342100240021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1200420012439 - 2¹³ = 1200420004247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200420312439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600210006219 + 600210006220.

It is an arithmetic number, because the mean of its divisors is an integer number (600210006220).

Almost surely, 2^{1200420012439} is an apocalyptic number.

1200420012439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200420012439 is an equidigital number, since it uses as much as digits as its factorization.

1200420012439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 1200420012439 in words is "one trillion, two hundred billion, four hundred twenty million, twelve thousand, four hundred thirty-nine".