4747721 has 4 divisors (see below), whose sum is σ = 5179344. Its totient is φ = 4316100.

The previous prime is 4747703. The next prime is 4747727. The reversal of 4747721 is 1277474.

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 4747721 - 2⁶ = 4747657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4747727) 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, 215795 + ... + 215816.

It is an arithmetic number, because the mean of its divisors is an integer number (1294836).

Almost surely, 2^4747721 is an apocalyptic number.

It is an amenable number.

4747721 is a deficient number, since it is larger than the sum of its proper divisors (431623).

4747721 is a wasteful number, since it uses less digits than its factorization.

4747721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431622.

The product of its digits is 10976, while the sum is 32.

The square root of 4747721 is about 2178.9265705847. The cubic root of 4747721 is about 168.0718820324.

The spelling of 4747721 in words is "four million, seven hundred forty-seven thousand, seven hundred twenty-one".