1235020459 has 2 divisors, whose sum is σ = 1235020460. Its totient is φ = 1235020458.

The previous prime is 1235020417. The next prime is 1235020487. The reversal of 1235020459 is 9540205321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1235020459 - 2¹⁹ = 1234496171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1235020459.

It is not a weakly prime, because it can be changed into another prime (1235020559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617510229 + 617510230.

It is an arithmetic number, because the mean of its divisors is an integer number (617510230).

Almost surely, 2^1235020459 is an apocalyptic number.

1235020459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235020459 is an equidigital number, since it uses as much as digits as its factorization.

1235020459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1235020459 is about 35142.8578661440. The cubic root of 1235020459 is about 1072.8970487970.

The spelling of 1235020459 in words is "one billion, two hundred thirty-five million, twenty thousand, four hundred fifty-nine".