1220339 has 4 divisors (see below), whose sum is σ = 1226856. Its totient is φ = 1213824.

The previous prime is 1220333. The next prime is 1220347. The reversal of 1220339 is 9330221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9330221 = 2521 ⋅3701.

It is a cyclic number.

It is not a de Polignac number, because 1220339 - 2²⁰ = 171763 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 1220339.

It is not an unprimeable number, because it can be changed into a prime (1220333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 3354.

It is an arithmetic number, because the mean of its divisors is an integer number (306714).

2^1220339 is an apocalyptic number.

1220339 is a deficient number, since it is larger than the sum of its proper divisors (6517).

1220339 is an equidigital number, since it uses as much as digits as its factorization.

1220339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6516.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1220339 is about 1104.6895491494. The cubic root of 1220339 is about 106.8628691360.

The spelling of 1220339 in words is "one million, two hundred twenty thousand, three hundred thirty-nine".