42684019 has 4 divisors (see below), whose sum is σ = 48781744. Its totient is φ = 36586296.

The previous prime is 42684017. The next prime is 42684029. The reversal of 42684019 is 91048624.

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

It is a cyclic number.

It is not a de Polignac number, because 42684019 - 2¹ = 42684017 is a prime.

It is a super-3 number, since 3×42684019³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42684011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3048852 + ... + 3048865.

It is an arithmetic number, because the mean of its divisors is an integer number (12195436).

Almost surely, 2^42684019 is an apocalyptic number.

42684019 is a deficient number, since it is larger than the sum of its proper divisors (6097725).

42684019 is an equidigital number, since it uses as much as digits as its factorization.

42684019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097724.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 42684019 is about 6533.3007737284. The cubic root of 42684019 is about 349.4795502848.

The spelling of 42684019 in words is "forty-two million, six hundred eighty-four thousand, nineteen".