4721643 has 12 divisors (see below), whose sum is σ = 6848088. Its totient is φ = 3134880.

The previous prime is 4721627. The next prime is 4721653. The reversal of 4721643 is 3461274.

It is not a de Polignac number, because 4721643 - 2⁴ = 4721627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4721653) 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 11 ways as a sum of consecutive naturals, for example, 1596 + ... + 3462.

It is an arithmetic number, because the mean of its divisors is an integer number (570674).

Almost surely, 2^4721643 is an apocalyptic number.

4721643 is a deficient number, since it is larger than the sum of its proper divisors (2126445).

4721643 is a wasteful number, since it uses less digits than its factorization.

4721643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154 (or 2151 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 4721643 is about 2172.9341913643. The cubic root of 4721643 is about 167.7635918041.

The spelling of 4721643 in words is "four million, seven hundred twenty-one thousand, six hundred forty-three".