42078567 has 4 divisors (see below), whose sum is σ = 56104760. Its totient is φ = 28052376.

The previous prime is 42078557. The next prime is 42078607. The reversal of 42078567 is 76587024.

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

It is not a de Polignac number, because 42078567 - 2¹⁶ = 42013031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078527) 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, 7013092 + ... + 7013097.

It is an arithmetic number, because the mean of its divisors is an integer number (14026190).

Almost surely, 2^42078567 is an apocalyptic number.

42078567 is a deficient number, since it is larger than the sum of its proper divisors (14026193).

42078567 is a wasteful number, since it uses less digits than its factorization.

42078567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14026192.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 42078567 is about 6486.7994419436. The cubic root of 42078567 is about 347.8192762908.

It can be divided in two parts, 420 and 78567, that added together give a palindrome (78987).

The spelling of 42078567 in words is "forty-two million, seventy-eight thousand, five hundred sixty-seven".