4455721 has 4 divisors (see below), whose sum is σ = 4649472. Its totient is φ = 4261972.

The previous prime is 4455719. The next prime is 4455743. The reversal of 4455721 is 1275544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4455721 - 2¹ = 4455719 is a prime.

It is a Duffinian number.

4455721 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4455721.

It is not an unprimeable number, because it can be changed into a prime (4455761) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 96841 + ... + 96886.

It is an arithmetic number, because the mean of its divisors is an integer number (1162368).

Almost surely, 2^4455721 is an apocalyptic number.

It is an amenable number.

4455721 is a deficient number, since it is larger than the sum of its proper divisors (193751).

4455721 is a wasteful number, since it uses less digits than its factorization.

4455721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193750.

The product of its digits is 5600, while the sum is 28.

The square root of 4455721 is about 2110.8578824734. The cubic root of 4455721 is about 164.5530727396.

The spelling of 4455721 in words is "four million, four hundred fifty-five thousand, seven hundred twenty-one".