445721361 has 16 divisors (see below), whose sum is σ = 637381440. Its totient is φ = 276194880.

The previous prime is 445721281. The next prime is 445721389. The reversal of 445721361 is 163127544.

It is not a de Polignac number, because 445721361 - 2¹⁰ = 445720337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445721261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70750 + ... + 76791.

It is an arithmetic number, because the mean of its divisors is an integer number (39836340).

Almost surely, 2^445721361 is an apocalyptic number.

It is an amenable number.

445721361 is a deficient number, since it is larger than the sum of its proper divisors (191660079).

445721361 is a wasteful number, since it uses less digits than its factorization.

445721361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147616.

The product of its digits is 20160, while the sum is 33.

The square root of 445721361 is about 21112.1140817304. The cubic root of 445721361 is about 763.8729818398.

The spelling of 445721361 in words is "four hundred forty-five million, seven hundred twenty-one thousand, three hundred sixty-one".