42540530 has 8 divisors (see below), whose sum is σ = 76572972. Its totient is φ = 17016208.

The previous prime is 42540529. The next prime is 42540539. The reversal of 42540530 is 3504524.

42540530 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 38850289 + 3690241 = 6233^2 + 1921^2 .

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 = 42540496 and 42540505.

It is not an unprimeable number, because it can be changed into a prime (42540539) 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, 2127017 + ... + 2127036.

Almost surely, 2^42540530 is an apocalyptic number.

42540530 is a deficient number, since it is larger than the sum of its proper divisors (34032442).

42540530 is a wasteful number, since it uses less digits than its factorization.

42540530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254060.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 42540530 is about 6522.3101735505. The cubic root of 42540530 is about 349.0875006038.

The spelling of 42540530 in words is "forty-two million, five hundred forty thousand, five hundred thirty".