445539 has 4 divisors (see below), whose sum is σ = 594056. Its totient is φ = 297024.

The previous prime is 445537. The next prime is 445541. The reversal of 445539 is 935544.

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

It is an interprime number because it is at equal distance from previous prime (445537) and next prime (445541).

It is not a de Polignac number, because 445539 - 2¹ = 445537 is a prime.

It is a D-number.

It is a Duffinian number.

445539 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (445537) 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, 74254 + ... + 74259.

It is an arithmetic number, because the mean of its divisors is an integer number (148514).

2⁴⁴⁵⁵³⁹ is an apocalyptic number.

445539 is a deficient number, since it is larger than the sum of its proper divisors (148517).

445539 is a wasteful number, since it uses less digits than its factorization.

445539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148516.

The product of its digits is 10800, while the sum is 30.

The square root of 445539 is about 667.4870785266. The cubic root of 445539 is about 76.3768791453.

The spelling of 445539 in words is "four hundred forty-five thousand, five hundred thirty-nine".