445545 has 12 divisors (see below), whose sum is σ = 772356. Its totient is φ = 237600.

The previous prime is 445541. The next prime is 445567. The reversal of 445545 is 545544.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 127449 = 564^2 + 357^2 .

It is not a de Polignac number, because 445545 - 2² = 445541 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

445545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (445541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4906 + ... + 4995.

It is an arithmetic number, because the mean of its divisors is an integer number (64363).

2⁴⁴⁵⁵⁴⁵ is an apocalyptic number.

445545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

445545 is a deficient number, since it is larger than the sum of its proper divisors (326811).

445545 is a wasteful number, since it uses less digits than its factorization.

445545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9912 (or 9909 counting only the distinct ones).

The product of its digits is 8000, while the sum is 27.

The square root of 445545 is about 667.4915729805. The cubic root of 445545 is about 76.3772219954.

Subtracting 445545 from its reverse (545544), we obtain a palindrome (99999).

It can be divided in two parts, 445 and 545, that added together give a triangular number (990 = T₄₄).

The spelling of 445545 in words is "four hundred forty-five thousand, five hundred forty-five".