42078164 has 12 divisors (see below), whose sum is σ = 73687488. Its totient is φ = 21024600.

The previous prime is 42078161. The next prime is 42078167. The reversal of 42078164 is 46187024.

It is an interprime number because it is at equal distance from previous prime (42078161) and next prime (42078167).

It is a super-2 number, since 2×42078164² = 3541143771221792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42078164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078161) 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, 5429 + ... + 10659.

It is an arithmetic number, because the mean of its divisors is an integer number (6140624).

Almost surely, 2^42078164 is an apocalyptic number.

It is an amenable number.

42078164 is a deficient number, since it is larger than the sum of its proper divisors (31609324).

42078164 is a wasteful number, since it uses less digits than its factorization.

42078164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246 (or 7244 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 42078164 is about 6486.7683787846. The cubic root of 42078164 is about 347.8181658948.

The spelling of 42078164 in words is "forty-two million, seventy-eight thousand, one hundred sixty-four".