1320039 has 24 divisors (see below), whose sum is σ = 2276352. Its totient is φ = 720720.

The previous prime is 1320037. The next prime is 1320061. The reversal of 1320039 is 9300231.

It is not a de Polignac number, because 1320039 - 2¹ = 1320037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 994 + ... + 1904.

It is an arithmetic number, because the mean of its divisors is an integer number (94848).

2^1320039 is an apocalyptic number.

1320039 is a deficient number, since it is larger than the sum of its proper divisors (956313).

1320039 is a wasteful number, since it uses less digits than its factorization.

1320039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1320039 is about 1148.9295017537. The cubic root of 1320039 is about 109.6972113787.

Adding to 1320039 its product of nonzero digits (162), we get a square (1320201 = 1149²).

The spelling of 1320039 in words is "one million, three hundred twenty thousand, thirty-nine".