445641 has 8 divisors (see below), whose sum is σ = 679104. Its totient is φ = 254640.

The previous prime is 445633. The next prime is 445649. The reversal of 445641 is 146544.

It is an interprime number because it is at equal distance from previous prime (445633) and next prime (445649).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 445641 - 2³ = 445633 is a prime.

445641 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445641.

It is not an unprimeable number, because it can be changed into a prime (445649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10590 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (84888).

2⁴⁴⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

445641 is a deficient number, since it is larger than the sum of its proper divisors (233463).

445641 is a wasteful number, since it uses less digits than its factorization.

445641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21231.

The product of its digits is 1920, while the sum is 24.

The square root of 445641 is about 667.5634801275. The cubic root of 445641 is about 76.3827071778.

Adding to 445641 its product of digits (1920), we get a square (447561 = 669²).

The spelling of 445641 in words is "four hundred forty-five thousand, six hundred forty-one".