42585145 has 4 divisors (see below), whose sum is σ = 51102180. Its totient is φ = 34068112.

The previous prime is 42585143. The next prime is 42585163. The reversal of 42585145 is 54158524.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20457529 + 22127616 = 4523^2 + 4704^2 .

It is a cyclic number.

It is not a de Polignac number, because 42585145 - 2¹ = 42585143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42585145.

It is not an unprimeable number, because it can be changed into a prime (42585143) 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, 4258510 + ... + 4258519.

It is an arithmetic number, because the mean of its divisors is an integer number (12775545).

Almost surely, 2^42585145 is an apocalyptic number.

It is an amenable number.

42585145 is a deficient number, since it is larger than the sum of its proper divisors (8517035).

42585145 is an equidigital number, since it uses as much as digits as its factorization.

42585145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517034.

The product of its digits is 32000, while the sum is 34.

The square root of 42585145 is about 6525.7294611407. The cubic root of 42585145 is about 349.2094948317.

The spelling of 42585145 in words is "forty-two million, five hundred eighty-five thousand, one hundred forty-five".