1078321 has 4 divisors (see below), whose sum is σ = 1101312. Its totient is φ = 1055332.

The previous prime is 1078247. The next prime is 1078331. The reversal of 1078321 is 1238701.

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: 1238701 = 43 ⋅28807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1078321 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1078292 and 1078301.

It is not an unprimeable number, because it can be changed into a prime (1078331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11425 + ... + 11518.

It is an arithmetic number, because the mean of its divisors is an integer number (275328).

2^1078321 is an apocalyptic number.

It is an amenable number.

1078321 is a deficient number, since it is larger than the sum of its proper divisors (22991).

1078321 is an equidigital number, since it uses as much as digits as its factorization.

1078321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22990.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1078321 is about 1038.4223610844. The cubic root of 1078321 is about 102.5453616394.

The spelling of 1078321 in words is "one million, seventy-eight thousand, three hundred twenty-one".