7200456721 has 4 divisors (see below), whose sum is σ = 7227026944. Its totient is φ = 7173886500.

The previous prime is 7200456673. The next prime is 7200456763. The reversal of 7200456721 is 1276540027.

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 7200456721 - 2⁹ = 7200456209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7200454721) 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, 13284705 + ... + 13285246.

It is an arithmetic number, because the mean of its divisors is an integer number (1806756736).

Almost surely, 2^7200456721 is an apocalyptic number.

It is an amenable number.

7200456721 is a deficient number, since it is larger than the sum of its proper divisors (26570223).

7200456721 is a wasteful number, since it uses less digits than its factorization.

7200456721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26570222.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 7200456721 is about 84855.5049540099. The cubic root of 7200456721 is about 1931.0195979107.

Adding to 7200456721 its reverse (1276540027), we get a palindrome (8476996748).

The spelling of 7200456721 in words is "seven billion, two hundred million, four hundred fifty-six thousand, seven hundred twenty-one".