42910281 has 12 divisors (see below), whose sum is σ = 62531508. Its totient is φ = 28353024.

The previous prime is 42910279. The next prime is 42910289. The reversal of 42910281 is 18201924.

It can be written as a sum of positive squares in 2 ways, for example, as 9455625 + 33454656 = 3075^2 + 5784^2 .

It is not a de Polignac number, because 42910281 - 2¹ = 42910279 is a prime.

It is a super-2 number, since 2×42910281² = 3682584430997922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42910289) 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 in 11 ways as a sum of consecutive naturals, for example, 20080 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (5210959).

Almost surely, 2^42910281 is an apocalyptic number.

It is an amenable number.

42910281 is a deficient number, since it is larger than the sum of its proper divisors (19621227).

42910281 is a wasteful number, since it uses less digits than its factorization.

42910281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42312 (or 42309 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 42910281 is about 6550.5939425368. The cubic root of 42910281 is about 350.0959764002.

The spelling of 42910281 in words is "forty-two million, nine hundred ten thousand, two hundred eighty-one".