4721306 has 4 divisors (see below), whose sum is σ = 7081962. Its totient is φ = 2360652.

The previous prime is 4721303. The next prime is 4721323. The reversal of 4721306 is 6031274.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6031274 = 2 ⋅3015637.

It can be written as a sum of positive squares in only one way, i.e., 4661281 + 60025 = 2159^2 + 245^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4721303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180325 + ... + 1180328.

Almost surely, 2^4721306 is an apocalyptic number.

4721306 is a deficient number, since it is larger than the sum of its proper divisors (2360656).

4721306 is a wasteful number, since it uses less digits than its factorization.

4721306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360655.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 4721306 is about 2172.8566450643. The cubic root of 4721306 is about 167.7596004198.

The spelling of 4721306 in words is "four million, seven hundred twenty-one thousand, three hundred six".