142438673421 has 20 divisors (see below), whose sum is σ = 232122284064. Its totient is φ = 86326468200.

The previous prime is 142438673401. The next prime is 142438673459. The reversal of 142438673421 is 124376834241.

142438673421 is a `hidden beast` number, since 1 + 4 + 243 + 8 + 67 + 342 + 1 = 666.

It is not a de Polignac number, because 142438673421 - 2⁶ = 142438673357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142438673401) 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 19 ways as a sum of consecutive naturals, for example, 79931025 + ... + 79932806.

Almost surely, 2^142438673421 is an apocalyptic number.

142438673421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142438673421 is a deficient number, since it is larger than the sum of its proper divisors (89683610643).

142438673421 is a wasteful number, since it uses less digits than its factorization.

142438673421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159863854 (or 159863845 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 142438673421 in words is "one hundred forty-two billion, four hundred thirty-eight million, six hundred seventy-three thousand, four hundred twenty-one".