142243642426 has 4 divisors (see below), whose sum is σ = 213365463642. Its totient is φ = 71121821212.

The previous prime is 142243642421. The next prime is 142243642441. The reversal of 142243642426 is 624246342241.

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

It can be written as a sum of positive squares in only one way, i.e., 142242876801 + 765625 = 377151^2 + 875^2 .

It is not an unprimeable number, because it can be changed into a prime (142243642421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35560910605 + ... + 35560910608.

Almost surely, 2^142243642426 is an apocalyptic number.

142243642426 is a deficient number, since it is larger than the sum of its proper divisors (71121821216).

142243642426 is an equidigital number, since it uses as much as digits as its factorization.

142243642426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71121821215.

The product of its digits is 442368, while the sum is 40.

Adding to 142243642426 its reverse (624246342241), we get a palindrome (766489984667).

The spelling of 142243642426 in words is "one hundred forty-two billion, two hundred forty-three million, six hundred forty-two thousand, four hundred twenty-six".