42538947 has 32 divisors (see below), whose sum is σ = 66023424. Its totient is φ = 24076800.

The previous prime is 42538919. The next prime is 42538949. The reversal of 42538947 is 74983524.

It is not a de Polignac number, because 42538947 - 2⁶ = 42538883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42538899 and 42538908.

It is not an unprimeable number, because it can be changed into a prime (42538949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106953 + ... + 107349.

It is an arithmetic number, because the mean of its divisors is an integer number (2063232).

Almost surely, 2^42538947 is an apocalyptic number.

42538947 is a deficient number, since it is larger than the sum of its proper divisors (23484477).

42538947 is a wasteful number, since it uses less digits than its factorization.

42538947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619.

The product of its digits is 241920, while the sum is 42.

The square root of 42538947 is about 6522.1888197138. The cubic root of 42538947 is about 349.0831705185.

The spelling of 42538947 in words is "forty-two million, five hundred thirty-eight thousand, nine hundred forty-seven".