321197 has 4 divisors (see below), whose sum is σ = 329916. Its totient is φ = 312480.

The previous prime is 321193. The next prime is 321199. The reversal of 321197 is 791123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791123 = 157 ⋅5039.

It can be written as a sum of positive squares in 2 ways, for example, as 276676 + 44521 = 526^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 321197 - 2² = 321193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321197.

It is not an unprimeable number, because it can be changed into a prime (321193) 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 3 ways as a sum of consecutive naturals, for example, 4304 + ... + 4377.

It is an arithmetic number, because the mean of its divisors is an integer number (82479).

2³²¹¹⁹⁷ is an apocalyptic number.

321197 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

321197 is a deficient number, since it is larger than the sum of its proper divisors (8719).

321197 is an equidigital number, since it uses as much as digits as its factorization.

321197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8718.

The product of its digits is 378, while the sum is 23.

The square root of 321197 is about 566.7424459135. The cubic root of 321197 is about 68.4842167980.

The spelling of 321197 in words is "three hundred twenty-one thousand, one hundred ninety-seven".