4455721001 has 4 divisors (see below), whose sum is σ = 4466355600. Its totient is φ = 4445086404.

The previous prime is 4455720953. The next prime is 4455721087. The reversal of 4455721001 is 1001275544.

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 a de Polignac number, because none of the positive numbers 2^k-4455721001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4455721201) 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, 5316671 + ... + 5317508.

It is an arithmetic number, because the mean of its divisors is an integer number (1116588900).

Almost surely, 2^4455721001 is an apocalyptic number.

It is an amenable number.

4455721001 is a deficient number, since it is larger than the sum of its proper divisors (10634599).

4455721001 is a wasteful number, since it uses less digits than its factorization.

4455721001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10634598.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 4455721001 is about 66751.1872628495. The cubic root of 4455721001 is about 1645.5307275186.

Adding to 4455721001 its reverse (1001275544), we get a palindrome (5456996545).

The spelling of 4455721001 in words is "four billion, four hundred fifty-five million, seven hundred twenty-one thousand, one".