1420123085809 has 2 divisors, whose sum is σ = 1420123085810. Its totient is φ = 1420123085808.

The previous prime is 1420123085749. The next prime is 1420123085893. The reversal of 1420123085809 is 9085803210241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1399851021409 + 20272064400 = 1183153^2 + 142380^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420123085809 - 2¹⁷ = 1420122954737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1420123085009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710061542904 + 710061542905.

It is an arithmetic number, because the mean of its divisors is an integer number (710061542905).

Almost surely, 2^{1420123085809} is an apocalyptic number.

It is an amenable number.

1420123085809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420123085809 is an equidigital number, since it uses as much as digits as its factorization.

1420123085809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 1420123085809 in words is "one trillion, four hundred twenty billion, one hundred twenty-three million, eighty-five thousand, eight hundred nine".