42305021 has 8 divisors (see below), whose sum is σ = 46392384. Its totient is φ = 38257920.

The previous prime is 42304979. The next prime is 42305041. The reversal of 42305021 is 12050324.

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 42305021 - 2⁶ = 42304957 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 (42305041) 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, 7841 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (5799048).

Almost surely, 2^42305021 is an apocalyptic number.

It is an amenable number.

42305021 is a deficient number, since it is larger than the sum of its proper divisors (4087363).

42305021 is a wasteful number, since it uses less digits than its factorization.

42305021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 42305021 is about 6504.2310075827. The cubic root of 42305021 is about 348.4421127008.

Adding to 42305021 its reverse (12050324), we get a palindrome (54355345).

The spelling of 42305021 in words is "forty-two million, three hundred five thousand, twenty-one".