142144229 has 4 divisors (see below), whose sum is σ = 142168320. Its totient is φ = 142120140.

The previous prime is 142144199. The next prime is 142144237. The reversal of 142144229 is 922441241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 922441241 = 19 ⋅48549539.

It is a cyclic number.

It is not a de Polignac number, because 142144229 - 2¹² = 142140133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142144129) 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, 3452 + ... + 17210.

It is an arithmetic number, because the mean of its divisors is an integer number (35542080).

Almost surely, 2^142144229 is an apocalyptic number.

It is an amenable number.

142144229 is a deficient number, since it is larger than the sum of its proper divisors (24091).

142144229 is a wasteful number, since it uses less digits than its factorization.

142144229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24090.

The product of its digits is 4608, while the sum is 29.

The square root of 142144229 is about 11922.4254663219. The cubic root of 142144229 is about 521.8869181019.

The spelling of 142144229 in words is "one hundred forty-two million, one hundred forty-four thousand, two hundred twenty-nine".