1205039 has 12 divisors (see below), whose sum is σ = 1385328. Its totient is φ = 1045440.

The previous prime is 1205027. The next prime is 1205047. The reversal of 1205039 is 9305021.

It is not a de Polignac number, because 1205039 - 2⁸ = 1204783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2567 + ... + 2999.

It is an arithmetic number, because the mean of its divisors is an integer number (115444).

2^1205039 is an apocalyptic number.

1205039 is a deficient number, since it is larger than the sum of its proper divisors (180289).

1205039 is a wasteful number, since it uses less digits than its factorization.

1205039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1205039 is about 1097.7426838745. The cubic root of 1205039 is about 106.4143918856.

The spelling of 1205039 in words is "one million, two hundred five thousand, thirty-nine".