1321319 has 2 divisors, whose sum is σ = 1321320. Its totient is φ = 1321318.

The previous prime is 1321303. The next prime is 1321349. The reversal of 1321319 is 9131231.

It is a weak prime.

It is an emirp because it is prime and its reverse (9131231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321319 - 2⁴ = 1321303 is a prime.

It is a super-2 number, since 2×1321319² = 3491767799522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660659 + 660660.

It is an arithmetic number, because the mean of its divisors is an integer number (660660).

2^1321319 is an apocalyptic number.

1321319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321319 is an equidigital number, since it uses as much as digits as its factorization.

1321319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 1321319 is about 1149.4864070532. The cubic root of 1321319 is about 109.7326565614.

The spelling of 1321319 in words is "one million, three hundred twenty-one thousand, three hundred nineteen".