42281017 has 2 divisors, whose sum is σ = 42281018. Its totient is φ = 42281016.

The previous prime is 42281011. The next prime is 42281021. The reversal of 42281017 is 71018224.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40309801 + 1971216 = 6349^2 + 1404^2 .

It is a cyclic number.

It is not a de Polignac number, because 42281017 - 2³ = 42281009 is a prime.

It is a super-3 number, since 3×42281017³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42280982 and 42281000.

It is not a weakly prime, because it can be changed into another prime (42281011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21140508 + 21140509.

It is an arithmetic number, because the mean of its divisors is an integer number (21140509).

Almost surely, 2^42281017 is an apocalyptic number.

It is an amenable number.

42281017 is a deficient number, since it is larger than the sum of its proper divisors (1).

42281017 is an equidigital number, since it uses as much as digits as its factorization.

42281017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 42281017 is about 6502.3854853431. The cubic root of 42281017 is about 348.3761978543.

The spelling of 42281017 in words is "forty-two million, two hundred eighty-one thousand, seventeen".