1421428407769 has 2 divisors, whose sum is σ = 1421428407770. Its totient is φ = 1421428407768.

The previous prime is 1421428407703. The next prime is 1421428407781. The reversal of 1421428407769 is 9677048241241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407457167769 + 13971240000 = 1186363^2 + 118200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421428407769 - 2¹³ = 1421428399577 is a prime.

It is a super-2 number, since 2×1421428407769² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1421428404769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710714203884 + 710714203885.

It is an arithmetic number, because the mean of its divisors is an integer number (710714203885).

Almost surely, 2^{1421428407769} is an apocalyptic number.

It is an amenable number.

1421428407769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421428407769 is an equidigital number, since it uses as much as digits as its factorization.

1421428407769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 1421428407769 in words is "one trillion, four hundred twenty-one billion, four hundred twenty-eight million, four hundred seven thousand, seven hundred sixty-nine".