139229 has 4 divisors (see below), whose sum is σ = 144060. Its totient is φ = 134400.

The previous prime is 139201. The next prime is 139241. The reversal of 139229 is 922931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76729 + 62500 = 277^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 139229 - 2¹⁶ = 73693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139198 and 139207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139429) 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, 2372 + ... + 2429.

It is an arithmetic number, because the mean of its divisors is an integer number (36015).

2¹³⁹²²⁹ is an apocalyptic number.

It is an amenable number.

139229 is a deficient number, since it is larger than the sum of its proper divisors (4831).

139229 is an equidigital number, since it uses as much as digits as its factorization.

139229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830.

The product of its digits is 972, while the sum is 26.

The square root of 139229 is about 373.1340241790. The cubic root of 139229 is about 51.8294461461.

It can be divided in two parts, 13922 and 9, that added together give a palindrome (13931).

The spelling of 139229 in words is "one hundred thirty-nine thousand, two hundred twenty-nine".