281081 has 2 divisors, whose sum is σ = 281082. Its totient is φ = 281080.

The previous prime is 281069. The next prime is 281117. The reversal of 281081 is 180182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241081 + 40000 = 491^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 281081 - 2¹⁴ = 264697 is a prime.

It is a super-2 number, since 2×281081² = 158013057122, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 281081.

It is not a weakly prime, because it can be changed into another prime (281381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140540 + 140541.

It is an arithmetic number, because the mean of its divisors is an integer number (140541).

2²⁸¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

281081 is a deficient number, since it is larger than the sum of its proper divisors (1).

281081 is an equidigital number, since it uses as much as digits as its factorization.

281081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 281081 is about 530.1707272191. The cubic root of 281081 is about 65.5054091060.

The spelling of 281081 in words is "two hundred eighty-one thousand, eighty-one".