142742235121 has 4 divisors (see below), whose sum is σ = 142744040100. Its totient is φ = 142740430144.

The previous prime is 142742235091. The next prime is 142742235143. The reversal of 142742235121 is 121532247241.

142742235121 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: 121532247241 = 84317 ⋅1441373.

It can be written as a sum of positive squares in 2 ways, for example, as 70668778896 + 72073456225 = 265836^2 + 268465^2 .

It is a cyclic number.

It is not a de Polignac number, because 142742235121 - 2¹³ = 142742226929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142742235191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778156 + ... + 943933.

It is an arithmetic number, because the mean of its divisors is an integer number (35686010025).

Almost surely, 2^142742235121 is an apocalyptic number.

It is an amenable number.

142742235121 is a deficient number, since it is larger than the sum of its proper divisors (1804979).

142742235121 is an equidigital number, since it uses as much as digits as its factorization.

142742235121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804978.

The product of its digits is 26880, while the sum is 34.

The spelling of 142742235121 in words is "one hundred forty-two billion, seven hundred forty-two million, two hundred thirty-five thousand, one hundred twenty-one".