142069745681 has 2 divisors, whose sum is σ = 142069745682. Its totient is φ = 142069745680.

The previous prime is 142069745621. The next prime is 142069745711. The reversal of 142069745681 is 186547960241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130616465281 + 11453280400 = 361409^2 + 107020^2 .

It is an emirp because it is prime and its reverse (186547960241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142069745681 - 2¹⁸ = 142069483537 is a prime.

It is a super-2 number, since 2×142069745681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142069745611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71034872840 + 71034872841.

It is an arithmetic number, because the mean of its divisors is an integer number (71034872841).

Almost surely, 2^142069745681 is an apocalyptic number.

It is an amenable number.

142069745681 is a deficient number, since it is larger than the sum of its proper divisors (1).

142069745681 is an equidigital number, since it uses as much as digits as its factorization.

142069745681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 142069745681 in words is "one hundred forty-two billion, sixty-nine million, seven hundred forty-five thousand, six hundred eighty-one".