42078169 has 8 divisors (see below), whose sum is σ = 48297600. Its totient is φ = 35910816.

The previous prime is 42078167. The next prime is 42078173. The reversal of 42078169 is 96187024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42078169 - 2¹ = 42078167 is a prime.

It is a super-2 number, since 2×42078169² = 3541144612785122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42078161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11269 + ... + 14530.

It is an arithmetic number, because the mean of its divisors is an integer number (6037200).

Almost surely, 2^42078169 is an apocalyptic number.

It is an amenable number.

42078169 is a deficient number, since it is larger than the sum of its proper divisors (6219431).

42078169 is a wasteful number, since it uses less digits than its factorization.

42078169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26039.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 42078169 is about 6486.7687641845. The cubic root of 42078169 is about 347.8181796715.

The spelling of 42078169 in words is "forty-two million, seventy-eight thousand, one hundred sixty-nine".