42101305 has 4 divisors (see below), whose sum is σ = 50521572. Its totient is φ = 33681040.

The previous prime is 42101287. The next prime is 42101309. The reversal of 42101305 is 50310124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13660416 + 28440889 = 3696^2 + 5333^2 .

It is not a de Polignac number, because 42101305 - 2⁵ = 42101273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42101309) 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 3 ways as a sum of consecutive naturals, for example, 4210126 + ... + 4210135.

It is an arithmetic number, because the mean of its divisors is an integer number (12630393).

Almost surely, 2^42101305 is an apocalyptic number.

It is an amenable number.

42101305 is a deficient number, since it is larger than the sum of its proper divisors (8420267).

42101305 is an equidigital number, since it uses as much as digits as its factorization.

42101305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8420266.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 42101305 is about 6488.5518415129. The cubic root of 42101305 is about 347.8819153899.

Adding to 42101305 its reverse (50310124), we get a palindrome (92411429).

The spelling of 42101305 in words is "forty-two million, one hundred one thousand, three hundred five".