7040221 has 2 divisors, whose sum is σ = 7040222. Its totient is φ = 7040220.

The previous prime is 7040213. The next prime is 7040263. The reversal of 7040221 is 1220407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4575321 + 2464900 = 2139^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 7040221 - 2³ = 7040213 is a prime.

It is a super-4 number, since 4×7040221⁴ (a number of 28 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7040195 and 7040204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7040281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3520110 + 3520111.

It is an arithmetic number, because the mean of its divisors is an integer number (3520111).

Almost surely, 2^7040221 is an apocalyptic number.

It is an amenable number.

7040221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7040221 is an equidigital number, since it uses as much as digits as its factorization.

7040221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 7040221 is about 2653.3414782120. The cubic root of 7040221 is about 191.6587997611.

Adding to 7040221 its reverse (1220407), we get a palindrome (8260628).

The spelling of 7040221 in words is "seven million, forty thousand, two hundred twenty-one".