141781681 has 2 divisors, whose sum is σ = 141781682. Its totient is φ = 141781680.

The previous prime is 141781643. The next prime is 141781687. The reversal of 141781681 is 186187141.

141781681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100821681 + 40960000 = 10041^2 + 6400^2 .

It is a cyclic number.

It is not a de Polignac number, because 141781681 - 2²⁷ = 7563953 is a prime.

It is a super-2 number, since 2×141781681² = 40204090134371522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 141781681.

It is not a weakly prime, because it can be changed into another prime (141781687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70890840 + 70890841.

It is an arithmetic number, because the mean of its divisors is an integer number (70890841).

Almost surely, 2^141781681 is an apocalyptic number.

It is an amenable number.

141781681 is a deficient number, since it is larger than the sum of its proper divisors (1).

141781681 is an equidigital number, since it uses as much as digits as its factorization.

141781681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 37.

The square root of 141781681 is about 11907.2113023999. The cubic root of 141781681 is about 521.4428382839.

The spelling of 141781681 in words is "one hundred forty-one million, seven hundred eighty-one thousand, six hundred eighty-one".