142444020421 has 8 divisors (see below), whose sum is σ = 142958421144. Its totient is φ = 141929998080.

The previous prime is 142444020419. The next prime is 142444020437. The reversal of 142444020421 is 124020444241.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2688422500 + 139755597921 = 51850^2 + 373839^2 .

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 142444020421 - 2¹ = 142444020419 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 142444020421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142444020461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670815 + ... + 857251.

It is an arithmetic number, because the mean of its divisors is an integer number (17869802643).

Almost surely, 2^142444020421 is an apocalyptic number.

It is an amenable number.

142444020421 is a deficient number, since it is larger than the sum of its proper divisors (514400723).

142444020421 is a wasteful number, since it uses less digits than its factorization.

142444020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189191.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 142444020421 its reverse (124020444241), we get a palindrome (266464464662).

The spelling of 142444020421 in words is "one hundred forty-two billion, four hundred forty-four million, twenty thousand, four hundred twenty-one".