1321318 has 4 divisors (see below), whose sum is σ = 1981980. Its totient is φ = 660658.

The previous prime is 1321303. The next prime is 1321319. The reversal of 1321318 is 8131231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8131231 = 37 ⋅219763.

It is a junction number, because it is equal to n+sod(n) for n = 1321295 and 1321304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330328 + ... + 330331.

It is an arithmetic number, because the mean of its divisors is an integer number (495495).

2^1321318 is an apocalyptic number.

1321318 is a deficient number, since it is larger than the sum of its proper divisors (660662).

1321318 is an equidigital number, since it uses as much as digits as its factorization.

1321318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660661.

The product of its digits is 144, while the sum is 19.

The square root of 1321318 is about 1149.4859720762. The cubic root of 1321318 is about 109.7326288788.

Adding to 1321318 its reverse (8131231), we get a palindrome (9452549).

It can be divided in two parts, 13213 and 18, that added together give a palindrome (13231).

The spelling of 1321318 in words is "one million, three hundred twenty-one thousand, three hundred eighteen".