4919221 has 4 divisors (see below), whose sum is σ = 5039244. Its totient is φ = 4799200.

The previous prime is 4919219. The next prime is 4919231. The reversal of 4919221 is 1229194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140625 + 4778596 = 375^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 4919221 - 2¹ = 4919219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4919221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4919231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59950 + ... + 60031.

It is an arithmetic number, because the mean of its divisors is an integer number (1259811).

Almost surely, 2^4919221 is an apocalyptic number.

4919221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4919221 is a deficient number, since it is larger than the sum of its proper divisors (120023).

4919221 is a wasteful number, since it uses less digits than its factorization.

4919221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120022.

The product of its digits is 1296, while the sum is 28.

The square root of 4919221 is about 2217.9316941691. The cubic root of 4919221 is about 170.0717229077.

The spelling of 4919221 in words is "four million, nine hundred nineteen thousand, two hundred twenty-one".