42008747 has 4 divisors (see below), whose sum is σ = 45827736. Its totient is φ = 38189760.

The previous prime is 42008693. The next prime is 42008749. The reversal of 42008747 is 74780024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42008747 - 2¹⁰ = 42007723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42008749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909478 + ... + 1909499.

It is an arithmetic number, because the mean of its divisors is an integer number (11456934).

Almost surely, 2^42008747 is an apocalyptic number.

42008747 is a deficient number, since it is larger than the sum of its proper divisors (3818989).

42008747 is a wasteful number, since it uses less digits than its factorization.

42008747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818988.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 42008747 is about 6481.4155089764. The cubic root of 42008747 is about 347.6267936113.

The spelling of 42008747 in words is "forty-two million, eight thousand, seven hundred forty-seven".