1321311 has 8 divisors (see below), whose sum is σ = 1799424. Its totient is φ = 862040.

The previous prime is 1321303. The next prime is 1321319. The reversal of 1321311 is 1131231.

It is an interprime number because it is at equal distance from previous prime (1321303) and next prime (1321319).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321311 - 2³ = 1321303 is a prime.

It is a zygodrome in base 4.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4545 + ... + 4826.

It is an arithmetic number, because the mean of its divisors is an integer number (224928).

2^1321311 is an apocalyptic number.

1321311 is a deficient number, since it is larger than the sum of its proper divisors (478113).

1321311 is an equidigital number, since it uses as much as digits as its factorization.

1321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9421.

The product of its digits is 18, while the sum is 12.

The square root of 1321311 is about 1149.4829272329. The cubic root of 1321311 is about 109.7324351001.

Adding to 1321311 its reverse (1131231), we get a palindrome (2452542).

The spelling of 1321311 in words is "one million, three hundred twenty-one thousand, three hundred eleven".