4875721 has 2 divisors, whose sum is σ = 4875722. Its totient is φ = 4875720.

The previous prime is 4875713. The next prime is 4875751. The reversal of 4875721 is 1275784.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4840000 + 35721 = 2200^2 + 189^2 .

It is a cyclic number.

It is not a de Polignac number, because 4875721 - 2³ = 4875713 is a prime.

It is not a weakly prime, because it can be changed into another prime (4875751) 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 as a sum of consecutive naturals, namely, 2437860 + 2437861.

It is an arithmetic number, because the mean of its divisors is an integer number (2437861).

Almost surely, 2^4875721 is an apocalyptic number.

It is an amenable number.

4875721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4875721 is an equidigital number, since it uses as much as digits as its factorization.

4875721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 34.

The square root of 4875721 is about 2208.1034848938. The cubic root of 4875721 is about 169.5689309299.

The spelling of 4875721 in words is "four million, eight hundred seventy-five thousand, seven hundred twenty-one".