4539985 has 4 divisors (see below), whose sum is σ = 5447988. Its totient is φ = 3631984.

The previous prime is 4539973. The next prime is 4539989. The reversal of 4539985 is 5899354.

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 3283344 + 1256641 = 1812^2 + 1121^2 .

It is a cyclic number.

It is not a de Polignac number, because 4539985 - 2¹¹ = 4537937 is a prime.

It is a super-2 number, since 2×4539985² = 41222927600450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4539989) 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, 453994 + ... + 454003.

It is an arithmetic number, because the mean of its divisors is an integer number (1361997).

Almost surely, 2^4539985 is an apocalyptic number.

It is an amenable number.

4539985 is a deficient number, since it is larger than the sum of its proper divisors (908003).

4539985 is an equidigital number, since it uses as much as digits as its factorization.

4539985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908002.

The product of its digits is 194400, while the sum is 43.

The square root of 4539985 is about 2130.7240553389. The cubic root of 4539985 is about 165.5839122002.

The spelling of 4539985 in words is "four million, five hundred thirty-nine thousand, nine hundred eighty-five".