140981 has 4 divisors (see below), whose sum is σ = 149292. Its totient is φ = 132672.

The previous prime is 140977. The next prime is 140983. The reversal of 140981 is 189041.

140981 = 265² + 266².

140981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

140981 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

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 70225 + 70756 = 265^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 140981 - 2² = 140977 is a prime.

It is a super-2 number, since 2×140981² = 39751284722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140981.

It is not an unprimeable number, because it can be changed into a prime (140983) 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, 4130 + ... + 4163.

It is an arithmetic number, because the mean of its divisors is an integer number (37323).

2¹⁴⁰⁹⁸¹ is an apocalyptic number.

140981 is the 266-th centered square number.

It is an amenable number.

140981 is a deficient number, since it is larger than the sum of its proper divisors (8311).

140981 is an equidigital number, since it uses as much as digits as its factorization.

140981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 140981 is about 375.4743666351. The cubic root of 140981 is about 52.0459406630.

The spelling of 140981 in words is "one hundred forty thousand, nine hundred eighty-one".