42800281 has 2 divisors, whose sum is σ = 42800282. Its totient is φ = 42800280.

The previous prime is 42800279. The next prime is 42800287. The reversal of 42800281 is 18200824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41718681 + 1081600 = 6459^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 42800281 - 2¹ = 42800279 is a prime.

It is a super-2 number, since 2×42800281² = 3663728107357922, which contains 22 as substring.

Together with 42800279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42800287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21400140 + 21400141.

It is an arithmetic number, because the mean of its divisors is an integer number (21400141).

Almost surely, 2^42800281 is an apocalyptic number.

It is an amenable number.

42800281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42800281 is an equidigital number, since it uses as much as digits as its factorization.

42800281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 42800281 is about 6542.1923695348. The cubic root of 42800281 is about 349.7965647707.

The spelling of 42800281 in words is "forty-two million, eight hundred thousand, two hundred eighty-one".