5242221 has 6 divisors (see below), whose sum is σ = 7572110. Its totient is φ = 3494808.

The previous prime is 5242217. The next prime is 5242231. The reversal of 5242221 is 1222425.

It can be written as a sum of positive squares in only one way, i.e., 3515625 + 1726596 = 1875^2 + 1314^2 .

It is not a de Polignac number, because 5242221 - 2² = 5242217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5242194 and 5242203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5242201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 291226 + ... + 291243.

Almost surely, 2^5242221 is an apocalyptic number.

It is an amenable number.

5242221 is a deficient number, since it is larger than the sum of its proper divisors (2329889).

5242221 is a wasteful number, since it uses less digits than its factorization.

5242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582475 (or 582472 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 5242221 is about 2289.5897012347. The cubic root of 5242221 is about 173.7154485063.

Adding to 5242221 its reverse (1222425), we get a palindrome (6464646).

The spelling of 5242221 in words is "five million, two hundred forty-two thousand, two hundred twenty-one".