139321 has 8 divisors (see below), whose sum is σ = 171584. Its totient is φ = 110160.

The previous prime is 139313. The next prime is 139333. The reversal of 139321 is 123931.

139321 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 139321 - 2³ = 139313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (21448).

2¹³⁹³²¹ is an apocalyptic number.

139321 is the 216-th hex number.

It is an amenable number.

139321 is a deficient number, since it is larger than the sum of its proper divisors (32263).

139321 is a wasteful number, since it uses less digits than its factorization.

139321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

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

The square root of 139321 is about 373.2572839209. The cubic root of 139321 is about 51.8408596187.

The spelling of 139321 in words is "one hundred thirty-nine thousand, three hundred twenty-one".