445215 has 16 divisors (see below), whose sum is σ = 724608. Its totient is φ = 233376.

The previous prime is 445199. The next prime is 445229. The reversal of 445215 is 512544.

It is not a de Polignac number, because 445215 - 2⁴ = 445199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445191 and 445200.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445215.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (45288).

2⁴⁴⁵²¹⁵ is an apocalyptic number.

445215 is a deficient number, since it is larger than the sum of its proper divisors (279393).

445215 is a wasteful number, since it uses less digits than its factorization.

445215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its digits is 800, while the sum is 21.

The square root of 445215 is about 667.2443330595. The cubic root of 445215 is about 76.3583606693.

Adding to 445215 its reverse (512544), we get a palindrome (957759).

The spelling of 445215 in words is "four hundred forty-five thousand, two hundred fifteen".