4721930 has 8 divisors (see below), whose sum is σ = 8499492. Its totient is φ = 1888768.

The previous prime is 4721911. The next prime is 4721933. The reversal of 4721930 is 391274.

It is a Cunningham number, because it is equal to 2173²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 4721929 + 1 = 2173^2 + 1^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 4721930.

It is not an unprimeable number, because it can be changed into a prime (4721933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236087 + ... + 236106.

Almost surely, 2^4721930 is an apocalyptic number.

4721930 is a deficient number, since it is larger than the sum of its proper divisors (3777562).

4721930 is a wasteful number, since it uses less digits than its factorization.

4721930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472200.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 4721930 is about 2173.0002300966. Note that the first 3 decimals coincide. The cubic root of 4721930 is about 167.7669908452.

The spelling of 4721930 in words is "four million, seven hundred twenty-one thousand, nine hundred thirty".