142229 has 4 divisors (see below), whose sum is σ = 145740. Its totient is φ = 138720.

The previous prime is 142223. The next prime is 142231. The reversal of 142229 is 922241.

142229 is nontrivially palindromic in base 14.

142229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922241 = 19 ⋅48539.

It can be written as a sum of positive squares in 2 ways, for example, as 5329 + 136900 = 73^2 + 370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142223) 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, 1694 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (36435).

2¹⁴²²²⁹ is an apocalyptic number.

It is an amenable number.

142229 is a deficient number, since it is larger than the sum of its proper divisors (3511).

142229 is an equidigital number, since it uses as much as digits as its factorization.

142229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510.

The product of its digits is 288, while the sum is 20.

The square root of 142229 is about 377.1326026744. The cubic root of 142229 is about 52.1990643931.

The spelling of 142229 in words is "one hundred forty-two thousand, two hundred twenty-nine".