445123 has 4 divisors (see below), whose sum is σ = 508720. Its totient is φ = 381528.

The previous prime is 445103. The next prime is 445141. The reversal of 445123 is 321544.

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

It is not a de Polignac number, because 445123 - 2⁵ = 445091 is a prime.

It is an Ulam 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 445123.

It is not an unprimeable number, because it can be changed into a prime (445103) 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, 31788 + ... + 31801.

It is an arithmetic number, because the mean of its divisors is an integer number (127180).

2⁴⁴⁵¹²³ is an apocalyptic number.

445123 is a deficient number, since it is larger than the sum of its proper divisors (63597).

445123 is an equidigital number, since it uses as much as digits as its factorization.

445123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63596.

The product of its digits is 480, while the sum is 19.

The square root of 445123 is about 667.1753892343. The cubic root of 445123 is about 76.3531006990.

Adding to 445123 its reverse (321544), we get a palindrome (766667).

The spelling of 445123 in words is "four hundred forty-five thousand, one hundred twenty-three".