445496721 has 16 divisors (see below), whose sum is σ = 602880000. Its totient is φ = 292573008.

The previous prime is 445496719. The next prime is 445496741. The reversal of 445496721 is 127694544.

It is not a de Polignac number, because 445496721 - 2¹ = 445496719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445496741) 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, 116380 + ... + 120146.

It is an arithmetic number, because the mean of its divisors is an integer number (37680000).

Almost surely, 2^445496721 is an apocalyptic number.

It is an amenable number.

445496721 is a deficient number, since it is larger than the sum of its proper divisors (157383279).

445496721 is a wasteful number, since it uses less digits than its factorization.

445496721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348.

The product of its digits is 241920, while the sum is 42.

The square root of 445496721 is about 21106.7932429348. The cubic root of 445496721 is about 763.7446316510.

The spelling of 445496721 in words is "four hundred forty-five million, four hundred ninety-six thousand, seven hundred twenty-one".