42168029 has 4 divisors (see below), whose sum is σ = 43528320. Its totient is φ = 40807740.

The previous prime is 42168017. The next prime is 42168037. The reversal of 42168029 is 92086124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42168029 - 2⁸ = 42167773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42167986 and 42168004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42168089) 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, 680099 + ... + 680160.

It is an arithmetic number, because the mean of its divisors is an integer number (10882080).

Almost surely, 2^42168029 is an apocalyptic number.

It is an amenable number.

42168029 is a deficient number, since it is larger than the sum of its proper divisors (1360291).

42168029 is a wasteful number, since it uses less digits than its factorization.

42168029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360290.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 42168029 is about 6493.6914771184. The cubic root of 42168029 is about 348.0655979084.

The spelling of 42168029 in words is "forty-two million, one hundred sixty-eight thousand, twenty-nine".