42021727 has 6 divisors (see below), whose sum is σ = 46189304. Its totient is φ = 38201460.

The previous prime is 42021703. The next prime is 42021743. The reversal of 42021727 is 72712024.

42021727 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42021727 - 2¹⁵ = 41988959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173523 + ... + 173764.

Almost surely, 2^42021727 is an apocalyptic number.

42021727 is a deficient number, since it is larger than the sum of its proper divisors (4167577).

42021727 is a wasteful number, since it uses less digits than its factorization.

42021727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347309 (or 347298 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 42021727 is about 6482.4167561180. The cubic root of 42021727 is about 347.6625935455.

It can be divided in two parts, 4202 and 1727, that added together give a square (5929 = 77²).

The spelling of 42021727 in words is "forty-two million, twenty-one thousand, seven hundred twenty-seven".