42409530 has 24 divisors (see below), whose sum is σ = 110265012. Its totient is φ = 11309184.

The previous prime is 42409517. The next prime is 42409537. The reversal of 42409530 is 3590424.

42409530 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 39350529 + 3059001 = 6273^2 + 1749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42409494 and 42409503.

It is not an unprimeable number, because it can be changed into a prime (42409537) 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 11 ways as a sum of consecutive naturals, for example, 235519 + ... + 235698.

Almost surely, 2^42409530 is an apocalyptic number.

42409530 is an abundant number, since it is smaller than the sum of its proper divisors (67855482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42409530 is a wasteful number, since it uses less digits than its factorization.

42409530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471230 (or 471227 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 42409530 is about 6512.2599763830. The cubic root of 42409530 is about 348.7288035832.

Adding to 42409530 its reverse (3590424), we get a palindrome (45999954).

The spelling of 42409530 in words is "forty-two million, four hundred nine thousand, five hundred thirty".