4972721 has 8 divisors (see below), whose sum is σ = 5670504. Its totient is φ = 4320000.

The previous prime is 4972691. The next prime is 4972727. The reversal of 4972721 is 1272794.

4972721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2217121 + 2755600 = 1489^2 + 1660^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4972721 - 2¹⁴ = 4956337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4972727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11030 + ... + 11471.

It is an arithmetic number, because the mean of its divisors is an integer number (708813).

Almost surely, 2^4972721 is an apocalyptic number.

It is an amenable number.

4972721 is a deficient number, since it is larger than the sum of its proper divisors (697783).

4972721 is a wasteful number, since it uses less digits than its factorization.

4972721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22531.

The product of its digits is 7056, while the sum is 32.

The square root of 4972721 is about 2229.9598651097. The cubic root of 4972721 is about 170.6860511802.

The spelling of 4972721 in words is "four million, nine hundred seventy-two thousand, seven hundred twenty-one".