42195729 has 8 divisors (see below), whose sum is σ = 57100960. Its totient is φ = 27710496.

The previous prime is 42195721. The next prime is 42195733. The reversal of 42195729 is 92759124.

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

It is not a de Polignac number, because 42195729 - 2³ = 42195721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42195721) 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, 104764 + ... + 105165.

It is an arithmetic number, because the mean of its divisors is an integer number (7137620).

Almost surely, 2^42195729 is an apocalyptic number.

It is an amenable number.

42195729 is a deficient number, since it is larger than the sum of its proper divisors (14905231).

42195729 is a wasteful number, since it uses less digits than its factorization.

42195729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209999.

The product of its digits is 45360, while the sum is 39.

The square root of 42195729 is about 6495.8239662109. The cubic root of 42195729 is about 348.1417954995.

It can be divided in two parts, 42195 and 729, that added together give a palindrome (42924).

The spelling of 42195729 in words is "forty-two million, one hundred ninety-five thousand, seven hundred twenty-nine".