445671 has 12 divisors (see below), whose sum is σ = 672048. Its totient is φ = 284064.

The previous prime is 445657. The next prime is 445691. The reversal of 445671 is 176544.

445671 = 63² + 64² + ... + 116².

It is not a de Polignac number, because 445671 - 2¹⁵ = 412903 is a prime.

It is a d-powerful number, because it can be written as 4⁸ + 4⁹ + 6³ + 5³ + 7⁶ + 1 .

445671 is a lucky number.

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 445671.

It is not an unprimeable number, because it can be changed into a prime (445631) 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, 870 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (56004).

2⁴⁴⁵⁶⁷¹ is an apocalyptic number.

445671 is a deficient number, since it is larger than the sum of its proper divisors (226377).

445671 is a wasteful number, since it uses less digits than its factorization.

445671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182 (or 2179 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 445671 is about 667.5859495226. The cubic root of 445671 is about 76.3844211357.

The spelling of 445671 in words is "four hundred forty-five thousand, six hundred seventy-one".