142739634421 has 4 divisors (see below), whose sum is σ = 142745813100. Its totient is φ = 142733455744.

The previous prime is 142739634419. The next prime is 142739634437. The reversal of 142739634421 is 124436937241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124436937241 = 11447 ⋅10870703.

It can be written as a sum of positive squares in 2 ways, for example, as 97602507396 + 45137127025 = 312414^2 + 212455^2 .

It is a cyclic number.

It is not a de Polignac number, because 142739634421 - 2¹ = 142739634419 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 (142739634451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3054556 + ... + 3100933.

It is an arithmetic number, because the mean of its divisors is an integer number (35686453275).

Almost surely, 2^142739634421 is an apocalyptic number.

It is an amenable number.

142739634421 is a deficient number, since it is larger than the sum of its proper divisors (6178679).

142739634421 is an equidigital number, since it uses as much as digits as its factorization.

142739634421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178678.

The product of its digits is 870912, while the sum is 46.

The spelling of 142739634421 in words is "one hundred forty-two billion, seven hundred thirty-nine million, six hundred thirty-four thousand, four hundred twenty-one".