142117908481 has 4 divisors (see below), whose sum is σ = 142229200212. Its totient is φ = 142006616752.

The previous prime is 142117908419. The next prime is 142117908529. The reversal of 142117908481 is 184809711241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42018440256 + 100099468225 = 204984^2 + 316385^2 .

It is a cyclic number.

It is not a de Polignac number, because 142117908481 - 2¹⁷ = 142117777409 is a prime.

It is a super-2 number, since 2×142117908481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142117308481) 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 3 ways as a sum of consecutive naturals, for example, 55643950 + ... + 55646503.

It is an arithmetic number, because the mean of its divisors is an integer number (35557300053).

Almost surely, 2^142117908481 is an apocalyptic number.

It is an amenable number.

142117908481 is a deficient number, since it is larger than the sum of its proper divisors (111291731).

142117908481 is a wasteful number, since it uses less digits than its factorization.

142117908481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111291730.

The product of its (nonzero) digits is 129024, while the sum is 46.

The spelling of 142117908481 in words is "one hundred forty-two billion, one hundred seventeen million, nine hundred eight thousand, four hundred eighty-one".