42758729 has 8 divisors (see below), whose sum is σ = 46099200. Its totient is φ = 39425616.

The previous prime is 42758713. The next prime is 42758747. The reversal of 42758729 is 92785724.

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 42758729 - 2⁴ = 42758713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42758729.

It is not an unprimeable number, because it can be changed into a prime (42758029) 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, 19322 + ... + 21420.

It is an arithmetic number, because the mean of its divisors is an integer number (5762400).

Almost surely, 2^42758729 is an apocalyptic number.

It is an amenable number.

42758729 is a deficient number, since it is larger than the sum of its proper divisors (3340471).

42758729 is a wasteful number, since it uses less digits than its factorization.

42758729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679.

The product of its digits is 282240, while the sum is 44.

The square root of 42758729 is about 6539.0159045532. The cubic root of 42758729 is about 349.6833298988.

The spelling of 42758729 in words is "forty-two million, seven hundred fifty-eight thousand, seven hundred twenty-nine".