42727729 has 8 divisors (see below), whose sum is σ = 47269440. Its totient is φ = 38295600.

The previous prime is 42727723. The next prime is 42727739. The reversal of 42727729 is 92772724.

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-42727729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42727691 and 42727700.

It is not an unprimeable number, because it can be changed into a prime (42727723) 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, 26574 + ... + 28135.

It is an arithmetic number, because the mean of its divisors is an integer number (5908680).

Almost surely, 2^42727729 is an apocalyptic number.

It is an amenable number.

42727729 is a deficient number, since it is larger than the sum of its proper divisors (4541711).

42727729 is a wasteful number, since it uses less digits than its factorization.

42727729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54791.

The product of its digits is 98784, while the sum is 40.

The square root of 42727729 is about 6536.6450875048. The cubic root of 42727729 is about 349.5988028775.

The spelling of 42727729 in words is "forty-two million, seven hundred twenty-seven thousand, seven hundred twenty-nine".