141781 has 4 divisors (see below), whose sum is σ = 146700. Its totient is φ = 136864.

The previous prime is 141773. The next prime is 141793. The reversal of 141781 is 187141.

141781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 87025 + 54756 = 295^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 141781 - 2³ = 141773 is a prime.

It is a super-2 number, since 2×141781² = 40203703922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2416 + ... + 2473.

It is an arithmetic number, because the mean of its divisors is an integer number (36675).

2¹⁴¹⁷⁸¹ is an apocalyptic number.

It is an amenable number.

141781 is a deficient number, since it is larger than the sum of its proper divisors (4919).

141781 is an equidigital number, since it uses as much as digits as its factorization.

141781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4918.

The product of its digits is 224, while the sum is 22.

The square root of 141781 is about 376.5381786752. The cubic root of 141781 is about 52.1442003425.

The spelling of 141781 in words is "one hundred forty-one thousand, seven hundred eighty-one".