42407305 has 4 divisors (see below), whose sum is σ = 50888772. Its totient is φ = 33925840.

The previous prime is 42407303. The next prime is 42407327. The reversal of 42407305 is 50370424.

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 31404816 + 11002489 = 5604^2 + 3317^2 .

It is not a de Polignac number, because 42407305 - 2¹ = 42407303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42407305.

It is not an unprimeable number, because it can be changed into a prime (42407303) 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, 4240726 + ... + 4240735.

It is an arithmetic number, because the mean of its divisors is an integer number (12722193).

Almost surely, 2^42407305 is an apocalyptic number.

It is an amenable number.

42407305 is a deficient number, since it is larger than the sum of its proper divisors (8481467).

42407305 is an equidigital number, since it uses as much as digits as its factorization.

42407305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481466.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 42407305 is about 6512.0891425103. The cubic root of 42407305 is about 348.7227048348.

Adding to 42407305 its reverse (50370424), we get a palindrome (92777729).

The spelling of 42407305 in words is "forty-two million, four hundred seven thousand, three hundred five".