1420121839 has 2 divisors, whose sum is σ = 1420121840. Its totient is φ = 1420121838.

The previous prime is 1420121777. The next prime is 1420121887. The reversal of 1420121839 is 9381210241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1420121839 - 2¹³ = 1420113647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1420121839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420121939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710060919 + 710060920.

It is an arithmetic number, because the mean of its divisors is an integer number (710060920).

Almost surely, 2^1420121839 is an apocalyptic number.

1420121839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420121839 is an equidigital number, since it uses as much as digits as its factorization.

1420121839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1420121839 is about 37684.5039638311. The cubic root of 1420121839 is about 1124.0230106251.

The spelling of 1420121839 in words is "one billion, four hundred twenty million, one hundred twenty-one thousand, eight hundred thirty-nine".