140281 has 2 divisors, whose sum is σ = 140282. Its totient is φ = 140280.

The previous prime is 140269. The next prime is 140297. The reversal of 140281 is 182041.

It is a happy number.

It is an a-pointer prime, because the next prime (140297) can be obtained adding 140281 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133225 + 7056 = 365^2 + 84^2 .

It is an emirp because it is prime and its reverse (182041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140281 - 2⁵ = 140249 is a prime.

It is a super-2 number, since 2×140281² = 39357517922, which contains 22 as substring.

140281 is a lucky number.

It is a plaindrome in base 9.

It is not a weakly prime, because it can be changed into another prime (140221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70140 + 70141.

It is an arithmetic number, because the mean of its divisors is an integer number (70141).

2¹⁴⁰²⁸¹ is an apocalyptic number.

140281 is the 168-th centered decagonal number.

It is an amenable number.

140281 is a deficient number, since it is larger than the sum of its proper divisors (1).

140281 is an equidigital number, since it uses as much as digits as its factorization.

140281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 140281 is about 374.5410524896. The cubic root of 140281 is about 51.9596580597.

It can be divided in two parts, 140 and 281, that multiplied together give a triangular number (39340 = T₂₈₀).

The spelling of 140281 in words is "one hundred forty thousand, two hundred eighty-one".