42023729 has 8 divisors (see below), whose sum is σ = 46962720. Its totient is φ = 37271200.

The previous prime is 42023669. The next prime is 42023741. The reversal of 42023729 is 92732024.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42023729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42023759) 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 7 ways as a sum of consecutive naturals, for example, 46139 + ... + 47040.

It is an arithmetic number, because the mean of its divisors is an integer number (5870340).

Almost surely, 2^42023729 is an apocalyptic number.

It is an amenable number.

42023729 is a deficient number, since it is larger than the sum of its proper divisors (4938991).

42023729 is a wasteful number, since it uses less digits than its factorization.

42023729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93231.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 42023729 is about 6482.5711719965. The cubic root of 42023729 is about 347.6681145740.

The spelling of 42023729 in words is "forty-two million, twenty-three thousand, seven hundred twenty-nine".