4725221 has 2 divisors, whose sum is σ = 4725222. Its totient is φ = 4725220.

The previous prime is 4725199. The next prime is 4725223. The reversal of 4725221 is 1225274.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3940225 + 784996 = 1985^2 + 886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4725221 is a prime.

Together with 4725223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4725223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2362610 + 2362611.

It is an arithmetic number, because the mean of its divisors is an integer number (2362611).

Almost surely, 2^4725221 is an apocalyptic number.

It is an amenable number.

4725221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4725221 is an equidigital number, since it uses as much as digits as its factorization.

4725221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 23.

The square root of 4725221 is about 2173.7573461636. The cubic root of 4725221 is about 167.8059574646.

The spelling of 4725221 in words is "four million, seven hundred twenty-five thousand, two hundred twenty-one".