42645530 has 8 divisors (see below), whose sum is σ = 76761972. Its totient is φ = 17058208.

The previous prime is 42645529. The next prime is 42645539. The reversal of 42645530 is 3554624.

It can be written as a sum of positive squares in 2 ways, for example, as 42627841 + 17689 = 6529^2 + 133^2 .

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 = 42645493 and 42645502.

It is not an unprimeable number, because it can be changed into a prime (42645539) 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 3 ways as a sum of consecutive naturals, for example, 2132267 + ... + 2132286.

Almost surely, 2^42645530 is an apocalyptic number.

42645530 is a deficient number, since it is larger than the sum of its proper divisors (34116442).

42645530 is a wasteful number, since it uses less digits than its factorization.

42645530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264560.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 42645530 is about 6530.3545079881. The cubic root of 42645530 is about 349.3744745539.

The spelling of 42645530 in words is "forty-two million, six hundred forty-five thousand, five hundred thirty".