7534221 has 4 divisors (see below), whose sum is σ = 10045632. Its totient is φ = 5022812.

The previous prime is 7534193. The next prime is 7534243. The reversal of 7534221 is 1224357.

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.

It is a cyclic number.

It is not a de Polignac number, because 7534221 - 2⁶ = 7534157 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7534191 and 7534200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7534291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255701 + ... + 1255706.

It is an arithmetic number, because the mean of its divisors is an integer number (2511408).

Almost surely, 2^7534221 is an apocalyptic number.

It is an amenable number.

7534221 is a deficient number, since it is larger than the sum of its proper divisors (2511411).

7534221 is a wasteful number, since it uses less digits than its factorization.

7534221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511410.

The product of its digits is 1680, while the sum is 24.

The square root of 7534221 is about 2744.8535480058. The cubic root of 7534221 is about 196.0406430362.

Adding to 7534221 its reverse (1224357), we get a palindrome (8758578).

The spelling of 7534221 in words is "seven million, five hundred thirty-four thousand, two hundred twenty-one".