445729 has 4 divisors (see below), whose sum is σ = 447876. Its totient is φ = 443584.

The previous prime is 445703. The next prime is 445741. The reversal of 445729 is 927544.

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

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 200704 = 495^2 + 448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445729 is a prime.

It is an Ulam number.

It is a Duffinian number.

445729 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 445729.

It is not an unprimeable number, because it can be changed into a prime (445769) 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, 724 + ... + 1189.

It is an arithmetic number, because the mean of its divisors is an integer number (111969).

2⁴⁴⁵⁷²⁹ is an apocalyptic number.

It is an amenable number.

445729 is a deficient number, since it is larger than the sum of its proper divisors (2147).

445729 is a wasteful number, since it uses less digits than its factorization.

445729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146.

The product of its digits is 10080, while the sum is 31.

The square root of 445729 is about 667.6293882088. The cubic root of 445729 is about 76.3877345696.

The spelling of 445729 in words is "four hundred forty-five thousand, seven hundred twenty-nine".