445491 has 6 divisors (see below), whose sum is σ = 643500. Its totient is φ = 296988.

The previous prime is 445477. The next prime is 445499. The reversal of 445491 is 194544.

It is not a de Polignac number, because 445491 - 2⁶ = 445427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445499) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24741 + ... + 24758.

It is an arithmetic number, because the mean of its divisors is an integer number (107250).

2⁴⁴⁵⁴⁹¹ is an apocalyptic number.

445491 is a deficient number, since it is larger than the sum of its proper divisors (198009).

445491 is a wasteful number, since it uses less digits than its factorization.

445491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49505 (or 49502 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 445491 is about 667.4511218059. The cubic root of 445491 is about 76.3741362340.

The spelling of 445491 in words is "four hundred forty-five thousand, four hundred ninety-one".