7254221 has 4 divisors (see below), whose sum is σ = 7812252. Its totient is φ = 6696192.

The previous prime is 7254211. The next prime is 7254259. The reversal of 7254221 is 1224527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1224527 = 17 ⋅72031.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 6708100 = 739^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 7254221 - 2¹⁴ = 7237837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7254211) 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, 278996 + ... + 279021.

It is an arithmetic number, because the mean of its divisors is an integer number (1953063).

Almost surely, 2^7254221 is an apocalyptic number.

It is an amenable number.

7254221 is a deficient number, since it is larger than the sum of its proper divisors (558031).

7254221 is a wasteful number, since it uses less digits than its factorization.

7254221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558030.

The product of its digits is 1120, while the sum is 23.

The square root of 7254221 is about 2693.3661095365. The cubic root of 7254221 is about 193.5813855956.

Adding to 7254221 its reverse (1224527), we get a palindrome (8478748).

The spelling of 7254221 in words is "seven million, two hundred fifty-four thousand, two hundred twenty-one".