42585247 has 6 divisors (see below), whose sum is σ = 43065672. Its totient is φ = 42106212.

The previous prime is 42585233. The next prime is 42585271. The reversal of 42585247 is 74258524.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-42585247 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 (42585287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65908 + ... + 66550.

It is an arithmetic number, because the mean of its divisors is an integer number (7177612).

Almost surely, 2^42585247 is an apocalyptic number.

42585247 is a deficient number, since it is larger than the sum of its proper divisors (480425).

42585247 is an frugal number, since it uses more digits than its factorization.

42585247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 746 counting only the distinct ones).

The product of its digits is 89600, while the sum is 37.

The square root of 42585247 is about 6525.7372763543. The cubic root of 42585247 is about 349.2097736405.

The spelling of 42585247 in words is "forty-two million, five hundred eighty-five thousand, two hundred forty-seven".