1225745421679 has 2 divisors, whose sum is σ = 1225745421680. Its totient is φ = 1225745421678.

The previous prime is 1225745421599. The next prime is 1225745421737. The reversal of 1225745421679 is 9761245475221.

It is a strong prime.

It is an emirp because it is prime and its reverse (9761245475221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225745421679 - 2¹⁷ = 1225745290607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225742421679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612872710839 + 612872710840.

It is an arithmetic number, because the mean of its divisors is an integer number (612872710840).

Almost surely, 2^{1225745421679} is an apocalyptic number.

1225745421679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225745421679 is an equidigital number, since it uses as much as digits as its factorization.

1225745421679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8467200, while the sum is 55.

The spelling of 1225745421679 in words is "one trillion, two hundred twenty-five billion, seven hundred forty-five million, four hundred twenty-one thousand, six hundred seventy-nine".