321139 has 8 divisors (see below), whose sum is σ = 395360. Its totient is φ = 254016.

The previous prime is 321109. The next prime is 321143. The reversal of 321139 is 931123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321139 - 2⁹ = 320627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321109) 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 7 ways as a sum of consecutive naturals, for example, 1674 + ... + 1855.

It is an arithmetic number, because the mean of its divisors is an integer number (49420).

2³²¹¹³⁹ is an apocalyptic number.

321139 is a deficient number, since it is larger than the sum of its proper divisors (74221).

321139 is a wasteful number, since it uses less digits than its factorization.

321139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549.

The product of its digits is 162, while the sum is 19.

The square root of 321139 is about 566.6912739755. The cubic root of 321139 is about 68.4800943813.

The spelling of 321139 in words is "three hundred twenty-one thousand, one hundred thirty-nine".