142391216935481 has 2 divisors, whose sum is σ = 142391216935482. Its totient is φ = 142391216935480.

The previous prime is 142391216935427. The next prime is 142391216935483. The reversal of 142391216935481 is 184539612193241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131972420805625 + 10418796129856 = 11487925^2 + 3227816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142391216935481 is a prime.

It is a super-2 number, since 2×142391216935481² (a number of 29 digits) contains 22 as substring.

Together with 142391216935483, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142391216935481.

It is not a weakly prime, because it can be changed into another prime (142391216935483) 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 as a sum of consecutive naturals, namely, 71195608467740 + 71195608467741.

It is an arithmetic number, because the mean of its divisors is an integer number (71195608467741).

Almost surely, 2^{142391216935481} is an apocalyptic number.

It is an amenable number.

142391216935481 is a deficient number, since it is larger than the sum of its proper divisors (1).

142391216935481 is an equidigital number, since it uses as much as digits as its factorization.

142391216935481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 59.

The spelling of 142391216935481 in words is "one hundred forty-two trillion, three hundred ninety-one billion, two hundred sixteen million, nine hundred thirty-five thousand, four hundred eighty-one".