42508247 has 8 divisors (see below), whose sum is σ = 42915072. Its totient is φ = 42103800.

The previous prime is 42508243. The next prime is 42508309. The reversal of 42508247 is 74280524.

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 42508247 - 2² = 42508243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42508243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61172 + ... + 61862.

It is an arithmetic number, because the mean of its divisors is an integer number (5364384).

Almost surely, 2^42508247 is an apocalyptic number.

42508247 is a deficient number, since it is larger than the sum of its proper divisors (406825).

42508247 is a wasteful number, since it uses less digits than its factorization.

42508247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42508247 is about 6519.8348905475. The cubic root of 42508247 is about 348.9991735133. Note that the first 3 decimals are identical.

The spelling of 42508247 in words is "forty-two million, five hundred eight thousand, two hundred forty-seven".