139218 has 8 divisors (see below), whose sum is σ = 278448. Its totient is φ = 46404.

The previous prime is 139201. The next prime is 139241. The reversal of 139218 is 812931.

139218 is nontrivially palindromic in base 4.

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

139218 is an admirable number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139218.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11596 + ... + 11607.

It is an arithmetic number, because the mean of its divisors is an integer number (34806).

2¹³⁹²¹⁸ is an apocalyptic number.

139218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139218 is a wasteful number, since it uses less digits than its factorization.

139218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23208.

The product of its digits is 432, while the sum is 24.

The square root of 139218 is about 373.1192838758. The cubic root of 139218 is about 51.8280811552.

The spelling of 139218 in words is "one hundred thirty-nine thousand, two hundred eighteen".