42684605 has 4 divisors (see below), whose sum is σ = 51221532. Its totient is φ = 34147680.

The previous prime is 42684589. The next prime is 42684617. The reversal of 42684605 is 50648624.

42684605 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 8508889 + 34175716 = 2917^2 + 5846^2 .

It is not a de Polignac number, because 42684605 - 2⁴ = 42684589 is a prime.

It is a super-3 number, since 3×42684605³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 4268456 + ... + 4268465.

It is an arithmetic number, because the mean of its divisors is an integer number (12805383).

Almost surely, 2^42684605 is an apocalyptic number.

It is an amenable number.

42684605 is a deficient number, since it is larger than the sum of its proper divisors (8536927).

42684605 is an equidigital number, since it uses as much as digits as its factorization.

42684605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8536926.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 42684605 is about 6533.3456207367. The cubic root of 42684605 is about 349.4811495881.

The spelling of 42684605 in words is "forty-two million, six hundred eighty-four thousand, six hundred five".