7450221 has 8 divisors (see below), whose sum is σ = 9957024. Its totient is φ = 4955120.

The previous prime is 7450213. The next prime is 7450231. The reversal of 7450221 is 1220547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7450221 - 2³ = 7450213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7450211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311 + ... + 4076.

It is an arithmetic number, because the mean of its divisors is an integer number (1244628).

Almost surely, 2^7450221 is an apocalyptic number.

It is an amenable number.

7450221 is a deficient number, since it is larger than the sum of its proper divisors (2506803).

7450221 is a wasteful number, since it uses less digits than its factorization.

7450221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7450221 is about 2729.5092965586. The cubic root of 7450221 is about 195.3093577436.

Adding to 7450221 its reverse (1220547), we get a palindrome (8670768).

The spelling of 7450221 in words is "seven million, four hundred fifty thousand, two hundred twenty-one".