42684305 has 4 divisors (see below), whose sum is σ = 51221172. Its totient is φ = 34147440.

The previous prime is 42684283. The next prime is 42684329. The reversal of 42684305 is 50348624.

42684305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9690769 + 32993536 = 3113^2 + 5744^2 .

It is not a de Polignac number, because 42684305 - 2¹⁰ = 42683281 is a prime.

It is a super-3 number, since 3×42684305³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4268426 + ... + 4268435.

It is an arithmetic number, because the mean of its divisors is an integer number (12805293).

Almost surely, 2^42684305 is an apocalyptic number.

It is an amenable number.

42684305 is a deficient number, since it is larger than the sum of its proper divisors (8536867).

42684305 is an equidigital number, since it uses as much as digits as its factorization.

42684305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8536866.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 42684305 is about 6533.3226615559. The cubic root of 42684305 is about 349.4803308340.

The spelling of 42684305 in words is "forty-two million, six hundred eighty-four thousand, three hundred five".