42421930 has 8 divisors (see below), whose sum is σ = 76359492. Its totient is φ = 16968768.

The previous prime is 42421837. The next prime is 42421933. The reversal of 42421930 is 3912424.

42421930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40564161 + 1857769 = 6369^2 + 1363^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 42421895 and 42421904.

It is not an unprimeable number, because it can be changed into a prime (42421933) 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 3 ways as a sum of consecutive naturals, for example, 2121087 + ... + 2121106.

Almost surely, 2^42421930 is an apocalyptic number.

42421930 is a deficient number, since it is larger than the sum of its proper divisors (33937562).

42421930 is a wasteful number, since it uses less digits than its factorization.

42421930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242200.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 42421930 is about 6513.2119572451. The cubic root of 42421930 is about 348.7627882071.

The spelling of 42421930 in words is "forty-two million, four hundred twenty-one thousand, nine hundred thirty".