4720321 has 2 divisors, whose sum is σ = 4720322. Its totient is φ = 4720320.

The previous prime is 4720307. The next prime is 4720327. The reversal of 4720321 is 1230274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 1185921 = 1880^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 4720321 - 2⁷ = 4720193 is a prime.

It is not a weakly prime, because it can be changed into another prime (4720327) 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 as a sum of consecutive naturals, namely, 2360160 + 2360161.

It is an arithmetic number, because the mean of its divisors is an integer number (2360161).

Almost surely, 2^4720321 is an apocalyptic number.

It is an amenable number.

4720321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4720321 is an equidigital number, since it uses as much as digits as its factorization.

4720321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 4720321 is about 2172.6299730971. The cubic root of 4720321 is about 167.7479331185.

Adding to 4720321 its reverse (1230274), we get a palindrome (5950595).

It can be divided in two parts, 4720 and 321, that added together give a square (5041 = 71²).

The spelling of 4720321 in words is "four million, seven hundred twenty thousand, three hundred twenty-one".