1178321 has 4 divisors (see below), whose sum is σ = 1247652. Its totient is φ = 1108992.

The previous prime is 1178297. The next prime is 1178347. The reversal of 1178321 is 1238711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1238711 = 23 ⋅53857.

It can be written as a sum of positive squares in 2 ways, for example, as 1081600 + 96721 = 1040^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1178321 - 2¹⁸ = 916177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1178371) 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, 34640 + ... + 34673.

It is an arithmetic number, because the mean of its divisors is an integer number (311913).

2^1178321 is an apocalyptic number.

It is an amenable number.

1178321 is a deficient number, since it is larger than the sum of its proper divisors (69331).

1178321 is an equidigital number, since it uses as much as digits as its factorization.

1178321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69330.

The product of its digits is 336, while the sum is 23.

The square root of 1178321 is about 1085.5049516239. The cubic root of 1178321 is about 105.6220370771.

The spelling of 1178321 in words is "one million, one hundred seventy-eight thousand, three hundred twenty-one".