1321219 has 2 divisors, whose sum is σ = 1321220. Its totient is φ = 1321218.

The previous prime is 1321213. The next prime is 1321247. The reversal of 1321219 is 9121231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321219 - 2¹⁹ = 796931 is a prime.

It is a super-2 number, since 2×1321219² = 3491239291922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321196 and 1321205.

It is not a weakly prime, because it can be changed into another prime (1321213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660609 + 660610.

It is an arithmetic number, because the mean of its divisors is an integer number (660610).

2^1321219 is an apocalyptic number.

1321219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321219 is an equidigital number, since it uses as much as digits as its factorization.

1321219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 19.

The square root of 1321219 is about 1149.4429085431. The cubic root of 1321219 is about 109.7298882310.

It can be divided in two parts, 13212 and 19, that added together give a palindrome (13231).

The spelling of 1321219 in words is "one million, three hundred twenty-one thousand, two hundred nineteen".