142816585 has 4 divisors (see below), whose sum is σ = 171379908. Its totient is φ = 114253264.

The previous prime is 142816577. The next prime is 142816589. The reversal of 142816585 is 585618241.

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 88115769 + 54700816 = 9387^2 + 7396^2 .

It is a cyclic number.

It is not a de Polignac number, because 142816585 - 2³ = 142816577 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142816589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14281654 + ... + 14281663.

It is an arithmetic number, because the mean of its divisors is an integer number (42844977).

Almost surely, 2^142816585 is an apocalyptic number.

It is an amenable number.

142816585 is a deficient number, since it is larger than the sum of its proper divisors (28563323).

142816585 is an equidigital number, since it uses as much as digits as its factorization.

142816585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28563322.

The product of its digits is 76800, while the sum is 40.

The square root of 142816585 is about 11950.5893160128. The cubic root of 142816585 is about 522.7084826929.

The spelling of 142816585 in words is "one hundred forty-two million, eight hundred sixteen thousand, five hundred eighty-five".