142144321 has 8 divisors (see below), whose sum is σ = 155155104. Its totient is φ = 129148320.

The previous prime is 142144297. The next prime is 142144333. The reversal of 142144321 is 123441241.

It is a happy number.

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 142144321 - 2¹⁹ = 141620033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142144292 and 142144301.

It is not an unprimeable number, because it can be changed into a prime (142144351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29166 + ... + 33688.

It is an arithmetic number, because the mean of its divisors is an integer number (19394388).

Almost surely, 2^142144321 is an apocalyptic number.

142144321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142144321 is a deficient number, since it is larger than the sum of its proper divisors (13010783).

142144321 is a wasteful number, since it uses less digits than its factorization.

142144321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7391.

The product of its digits is 768, while the sum is 22.

The square root of 142144321 is about 11922.4293245966. The cubic root of 142144321 is about 521.8870306954.

Adding to 142144321 its reverse (123441241), we get a palindrome (265585562).

The spelling of 142144321 in words is "one hundred forty-two million, one hundred forty-four thousand, three hundred twenty-one".