445721242 has 16 divisors (see below), whose sum is σ = 692634240. Its totient is φ = 214865392.

The previous prime is 445721201. The next prime is 445721261. The reversal of 445721242 is 242127544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37923 + ... + 48265.

It is an arithmetic number, because the mean of its divisors is an integer number (43289640).

Almost surely, 2^445721242 is an apocalyptic number.

445721242 is a deficient number, since it is larger than the sum of its proper divisors (246912998).

445721242 is a wasteful number, since it uses less digits than its factorization.

445721242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11117.

The product of its digits is 17920, while the sum is 31.

The square root of 445721242 is about 21112.1112634431. Note that the first 3 decimals coincide. The cubic root of 445721242 is about 763.8729138594.

Adding to 445721242 its reverse (242127544), we get a palindrome (687848786).

The spelling of 445721242 in words is "four hundred forty-five million, seven hundred twenty-one thousand, two hundred forty-two".