1284720974123 has 2 divisors, whose sum is σ = 1284720974124. Its totient is φ = 1284720974122.

The previous prime is 1284720974113. The next prime is 1284720974161. The reversal of 1284720974123 is 3214790274821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1284720974123 - 2⁸ = 1284720973867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1284720974113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642360487061 + 642360487062.

It is an arithmetic number, because the mean of its divisors is an integer number (642360487062).

Almost surely, 2^{1284720974123} is an apocalyptic number.

1284720974123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284720974123 is an equidigital number, since it uses as much as digits as its factorization.

1284720974123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 1284720974123 in words is "one trillion, two hundred eighty-four billion, seven hundred twenty million, nine hundred seventy-four thousand, one hundred twenty-three".