42420530 has 16 divisors (see below), whose sum is σ = 76512384. Its totient is φ = 16933680.

The previous prime is 42420529. The next prime is 42420541. The reversal of 42420530 is 3502424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175 + ... + 9285.

It is an arithmetic number, because the mean of its divisors is an integer number (4782024).

Almost surely, 2^42420530 is an apocalyptic number.

42420530 is a deficient number, since it is larger than the sum of its proper divisors (34091854).

42420530 is a wasteful number, since it uses less digits than its factorization.

42420530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42420530 is about 6513.1044825029. The cubic root of 42420530 is about 348.7589515651.

Adding to 42420530 its reverse (3502424), we get a palindrome (45922954).

The spelling of 42420530 in words is "forty-two million, four hundred twenty thousand, five hundred thirty".