1081321 has 4 divisors (see below), whose sum is σ = 1106512. Its totient is φ = 1056132.

The previous prime is 1081307. The next prime is 1081331. The reversal of 1081321 is 1231801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1231801 = 257 ⋅4793.

It is a cyclic number.

It is not a de Polignac number, because 1081321 - 2¹⁹ = 557033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1081295 and 1081304.

It is not an unprimeable number, because it can be changed into a prime (1081331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12531 + ... + 12616.

It is an arithmetic number, because the mean of its divisors is an integer number (276628).

2^1081321 is an apocalyptic number.

It is an amenable number.

1081321 is a deficient number, since it is larger than the sum of its proper divisors (25191).

1081321 is an equidigital number, since it uses as much as digits as its factorization.

1081321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25190.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1081321 is about 1039.8658567335. The cubic root of 1081321 is about 102.6403708352.

The spelling of 1081321 in words is "one million, eighty-one thousand, three hundred twenty-one".