7024221 has 6 divisors (see below), whose sum is σ = 10146110. Its totient is φ = 4682808.

The previous prime is 7024217. The next prime is 7024231. The reversal of 7024221 is 1224207.

It can be written as a sum of positive squares in only one way, i.e., 3944196 + 3080025 = 1986^2 + 1755^2 .

It is not a de Polignac number, because 7024221 - 2² = 7024217 is a prime.

It is a Duffinian number.

7024221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7024194 and 7024203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7024231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390226 + ... + 390243.

Almost surely, 2^7024221 is an apocalyptic number.

It is an amenable number.

7024221 is a deficient number, since it is larger than the sum of its proper divisors (3121889).

7024221 is a wasteful number, since it uses less digits than its factorization.

7024221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780475 (or 780472 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7024221 is about 2650.3246970890. The cubic root of 7024221 is about 191.5134981294.

Adding to 7024221 its reverse (1224207), we get a palindrome (8248428).

The spelling of 7024221 in words is "seven million, twenty-four thousand, two hundred twenty-one".