42508805 has 8 divisors (see below), whose sum is σ = 51412992. Its totient is φ = 33738768.

The previous prime is 42508799. The next prime is 42508847. The reversal of 42508805 is 50880524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42508805 - 2¹⁴ = 42492421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32837 + ... + 34106.

It is an arithmetic number, because the mean of its divisors is an integer number (6426624).

Almost surely, 2^42508805 is an apocalyptic number.

It is an amenable number.

42508805 is a deficient number, since it is larger than the sum of its proper divisors (8904187).

42508805 is a wasteful number, since it uses less digits than its factorization.

42508805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67075.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 42508805 is about 6519.8776829017. The cubic root of 42508805 is about 349.0007005949. Note that the first 3 decimals are identical.

The spelling of 42508805 in words is "forty-two million, five hundred eight thousand, eight hundred five".