1020502409 has 8 divisors (see below), whose sum is σ = 1038640320. Its totient is φ = 1002392656.

The previous prime is 1020502397. The next prime is 1020502411. The reversal of 1020502409 is 9042050201.

1020502409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020502409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020502429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74327 + ... + 86979.

It is an arithmetic number, because the mean of its divisors is an integer number (129830040).

Almost surely, 2^1020502409 is an apocalyptic number.

It is an amenable number.

1020502409 is a deficient number, since it is larger than the sum of its proper divisors (18137911).

1020502409 is a wasteful number, since it uses less digits than its factorization.

1020502409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14079.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1020502409 is about 31945.3033950219. The cubic root of 1020502409 is about 1006.7879557355.

The spelling of 1020502409 in words is "one billion, twenty million, five hundred two thousand, four hundred nine".