1321330 has 16 divisors (see below), whose sum is σ = 2392920. Its totient is φ = 525312.

The previous prime is 1321319. The next prime is 1321349. The reversal of 1321330 is 331231.

It can be written as a sum of positive squares in 4 ways, for example, as 1292769 + 28561 = 1137^2 + 169^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1321330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2002 + ... + 2578.

2^1321330 is an apocalyptic number.

1321330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321330 is a deficient number, since it is larger than the sum of its proper divisors (1071590).

1321330 is a wasteful number, since it uses less digits than its factorization.

1321330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1321330 is about 1149.4911917888. The cubic root of 1321330 is about 109.7329610692.

Adding to 1321330 its reverse (331231), we get a palindrome (1652561).

Subtracting from 1321330 its reverse (331231), we obtain a palindrome (990099).

The spelling of 1321330 in words is "one million, three hundred twenty-one thousand, three hundred thirty".