4739221 has 2 divisors, whose sum is σ = 4739222. Its totient is φ = 4739220.

The previous prime is 4739213. The next prime is 4739237. The reversal of 4739221 is 1229374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 1535121 = 1790^2 + 1239^2 .

It is a cyclic number.

It is not a de Polignac number, because 4739221 - 2³ = 4739213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4739221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4739291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2369610 + 2369611.

It is an arithmetic number, because the mean of its divisors is an integer number (2369611).

Almost surely, 2^4739221 is an apocalyptic number.

It is an amenable number.

4739221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4739221 is an equidigital number, since it uses as much as digits as its factorization.

4739221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 4739221 is about 2176.9751950815. The cubic root of 4739221 is about 167.9715205882.

The spelling of 4739221 in words is "four million, seven hundred thirty-nine thousand, two hundred twenty-one".