1321385 has 16 divisors (see below), whose sum is σ = 1769040. Its totient is φ = 940800.

The previous prime is 1321379. The next prime is 1321391. The reversal of 1321385 is 5831231.

1321385 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (1321379) and next prime (1321391).

It can be written as a sum of positive squares in 8 ways, for example, as 3481 + 1317904 = 59^2 + 1148^2 .

It is not a de Polignac number, because 1321385 - 2²⁰ = 272809 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321385.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1535 + ... + 2235.

It is an arithmetic number, because the mean of its divisors is an integer number (110565).

2^1321385 is an apocalyptic number.

It is an amenable number.

1321385 is a deficient number, since it is larger than the sum of its proper divisors (447655).

1321385 is a wasteful number, since it uses less digits than its factorization.

1321385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748.

The product of its digits is 720, while the sum is 23.

The square root of 1321385 is about 1149.5151151681. The cubic root of 1321385 is about 109.7344835829.

The spelling of 1321385 in words is "one million, three hundred twenty-one thousand, three hundred eighty-five".