1420123043309 has 2 divisors, whose sum is σ = 1420123043310. Its totient is φ = 1420123043308.

The previous prime is 1420123043267. The next prime is 1420123043363. The reversal of 1420123043309 is 9033403210241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217222345284 + 202900698025 = 1103278^2 + 450445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420123043309 - 2¹⁶ = 1420122977773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420123043399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710061521654 + 710061521655.

It is an arithmetic number, because the mean of its divisors is an integer number (710061521655).

Almost surely, 2^{1420123043309} is an apocalyptic number.

It is an amenable number.

1420123043309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420123043309 is an equidigital number, since it uses as much as digits as its factorization.

1420123043309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 1420123043309 in words is "one trillion, four hundred twenty billion, one hundred twenty-three million, forty-three thousand, three hundred nine".