7464221 has 4 divisors (see below), whose sum is σ = 7471200. Its totient is φ = 7457244.

The previous prime is 7464217. The next prime is 7464227. The reversal of 7464221 is 1224647.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1224647 = 701 ⋅1747.

It is a cyclic number.

It is not a de Polignac number, because 7464221 - 2² = 7464217 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 (7464227) 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, 1511 + ... + 4148.

It is an arithmetic number, because the mean of its divisors is an integer number (1867800).

Almost surely, 2^7464221 is an apocalyptic number.

It is an amenable number.

7464221 is a deficient number, since it is larger than the sum of its proper divisors (6979).

7464221 is a wasteful number, since it uses less digits than its factorization.

7464221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978.

The product of its digits is 2688, while the sum is 26.

The square root of 7464221 is about 2732.0726564277. The cubic root of 7464221 is about 195.4316189966.

Adding to 7464221 its reverse (1224647), we get a palindrome (8688868).

The spelling of 7464221 in words is "seven million, four hundred sixty-four thousand, two hundred twenty-one".