42527721 has 8 divisors (see below), whose sum is σ = 56736064. Its totient is φ = 28335600.

The previous prime is 42527707. The next prime is 42527741. The reversal of 42527721 is 12772524.

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

It is not a de Polignac number, because 42527721 - 2⁶ = 42527657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42527741) 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, 4875 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (7092008).

Almost surely, 2^42527721 is an apocalyptic number.

It is an amenable number.

42527721 is a deficient number, since it is larger than the sum of its proper divisors (14208343).

42527721 is a wasteful number, since it uses less digits than its factorization.

42527721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111.

The product of its digits is 7840, while the sum is 30.

The square root of 42527721 is about 6521.3281622688. The cubic root of 42527721 is about 349.0524602109.

The spelling of 42527721 in words is "forty-two million, five hundred twenty-seven thousand, seven hundred twenty-one".