1321327 has 16 divisors (see below), whose sum is σ = 1635840. Its totient is φ = 1042272.

The previous prime is 1321319. The next prime is 1321349. The reversal of 1321327 is 7231231.

It is not a de Polignac number, because 1321327 - 2³ = 1321319 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321357) 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 15 ways as a sum of consecutive naturals, for example, 4528 + ... + 4810.

It is an arithmetic number, because the mean of its divisors is an integer number (102240).

2^1321327 is an apocalyptic number.

1321327 is a deficient number, since it is larger than the sum of its proper divisors (314513).

1321327 is a wasteful number, since it uses less digits than its factorization.

1321327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its digits is 252, while the sum is 19.

The square root of 1321327 is about 1149.4898868629. The cubic root of 1321327 is about 109.7328780218.

Adding to 1321327 its reverse (7231231), we get a palindrome (8552558).

The spelling of 1321327 in words is "one million, three hundred twenty-one thousand, three hundred twenty-seven".