141805681 has 2 divisors, whose sum is σ = 141805682. Its totient is φ = 141805680.

The previous prime is 141805637. The next prime is 141805691. The reversal of 141805681 is 186508141.

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., 118919025 + 22886656 = 10905^2 + 4784^2 .

It is an emirp because it is prime and its reverse (186508141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 141805681 - 2¹¹ = 141803633 is a prime.

It is a super-2 number, since 2×141805681² = 40217702327747522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (141805691) 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 as a sum of consecutive naturals, namely, 70902840 + 70902841.

It is an arithmetic number, because the mean of its divisors is an integer number (70902841).

Almost surely, 2^141805681 is an apocalyptic number.

It is an amenable number.

141805681 is a deficient number, since it is larger than the sum of its proper divisors (1).

141805681 is an equidigital number, since it uses as much as digits as its factorization.

141805681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 141805681 is about 11908.2190524024. The cubic root of 141805681 is about 521.4722589208.

The spelling of 141805681 in words is "one hundred forty-one million, eight hundred five thousand, six hundred eighty-one".