1200012039 has 6 divisors (see below), whose sum is σ = 1733350736. Its totient is φ = 800008020.

The previous prime is 1200012019. The next prime is 1200012053. The reversal of 1200012039 is 9302100021.

It is a happy number.

1200012039 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1200012039 - 2¹⁷ = 1199880967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200012019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66667327 + ... + 66667344.

Almost surely, 2^1200012039 is an apocalyptic number.

1200012039 is a deficient number, since it is larger than the sum of its proper divisors (533338697).

1200012039 is a wasteful number, since it uses less digits than its factorization.

1200012039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133334677 (or 133334674 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1200012039 is about 34641.1899189390. The cubic root of 1200012039 is about 1062.6621228781.

The spelling of 1200012039 in words is "one billion, two hundred million, twelve thousand, thirty-nine".