42656530 has 16 divisors (see below), whose sum is σ = 87750720. Its totient is φ = 14625072.

The previous prime is 42656521. The next prime is 42656533. The reversal of 42656530 is 3565624.

It is a junction number, because it is equal to n+sod(n) for n = 42656492 and 42656501.

It is not an unprimeable number, because it can be changed into a prime (42656533) by changing a digit.

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, 304620 + ... + 304759.

It is an arithmetic number, because the mean of its divisors is an integer number (5484420).

Almost surely, 2^42656530 is an apocalyptic number.

42656530 is an abundant number, since it is smaller than the sum of its proper divisors (45094190).

42656530 is a wasteful number, since it uses less digits than its factorization.

42656530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609393.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 42656530 is about 6531.1966744235. The cubic root of 42656530 is about 349.4045112216.

The spelling of 42656530 in words is "forty-two million, six hundred fifty-six thousand, five hundred thirty".