4965721 has 4 divisors (see below), whose sum is σ = 5017012. Its totient is φ = 4914432.

The previous prime is 4965689. The next prime is 4965731. The reversal of 4965721 is 1275694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 921600 + 4044121 = 960^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 4965721 - 2⁵ = 4965689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4965731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25500 + ... + 25693.

It is an arithmetic number, because the mean of its divisors is an integer number (1254253).

Almost surely, 2^4965721 is an apocalyptic number.

It is an amenable number.

4965721 is a deficient number, since it is larger than the sum of its proper divisors (51291).

4965721 is an equidigital number, since it uses as much as digits as its factorization.

4965721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51290.

The product of its digits is 15120, while the sum is 34.

The square root of 4965721 is about 2228.3897773953. The cubic root of 4965721 is about 170.6059231222.

The spelling of 4965721 in words is "four million, nine hundred sixty-five thousand, seven hundred twenty-one".