281294081 has 2 divisors, whose sum is σ = 281294082. Its totient is φ = 281294080.

The previous prime is 281294059. The next prime is 281294129. The reversal of 281294081 is 180492182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215943025 + 65351056 = 14695^2 + 8084^2 .

It is a cyclic number.

It is not a de Polignac number, because 281294081 - 2¹⁸ = 281031937 is a prime.

It is a super-3 number, since 3×281294081³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (281294381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140647040 + 140647041.

It is an arithmetic number, because the mean of its divisors is an integer number (140647041).

Almost surely, 2^281294081 is an apocalyptic number.

It is an amenable number.

281294081 is a deficient number, since it is larger than the sum of its proper divisors (1).

281294081 is an equidigital number, since it uses as much as digits as its factorization.

281294081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 281294081 is about 16771.8240212566. The cubic root of 281294081 is about 655.2195763645.

The spelling of 281294081 in words is "two hundred eighty-one million, two hundred ninety-four thousand, eighty-one".