4442539 has 4 divisors (see below), whose sum is σ = 4595760. Its totient is φ = 4289320.

The previous prime is 4442531. The next prime is 4442549. The reversal of 4442539 is 9352444.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4442539 - 2³ = 4442531 is a prime.

It is a Smith number, since the sum of its digits (31) 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 a self number, because there is not a number n which added to its sum of digits gives 4442539.

It is not an unprimeable number, because it can be changed into a prime (4442531) 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, 76567 + ... + 76624.

It is an arithmetic number, because the mean of its divisors is an integer number (1148940).

Almost surely, 2^4442539 is an apocalyptic number.

4442539 is a deficient number, since it is larger than the sum of its proper divisors (153221).

4442539 is a wasteful number, since it uses less digits than its factorization.

4442539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153220.

The product of its digits is 17280, while the sum is 31.

The square root of 4442539 is about 2107.7331425017. The cubic root of 4442539 is about 164.3906387796.

The spelling of 4442539 in words is "four million, four hundred forty-two thousand, five hundred thirty-nine".