1320589 has 4 divisors (see below), whose sum is σ = 1342300. Its totient is φ = 1298880.

The previous prime is 1320541. The next prime is 1320607. The reversal of 1320589 is 9850231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9850231 = 1237 ⋅7963.

It can be written as a sum of positive squares in 2 ways, for example, as 218089 + 1102500 = 467^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320589 - 2¹³ = 1312397 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10764 + ... + 10885.

It is an arithmetic number, because the mean of its divisors is an integer number (335575).

2^1320589 is an apocalyptic number.

It is an amenable number.

1320589 is a deficient number, since it is larger than the sum of its proper divisors (21711).

1320589 is an equidigital number, since it uses as much as digits as its factorization.

1320589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21710.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1320589 is about 1149.1688300681. The cubic root of 1320589 is about 109.7124445369.

It can be divided in two parts, 13 and 20589, that added together give a palindrome (20602).

The spelling of 1320589 in words is "one million, three hundred twenty thousand, five hundred eighty-nine".