7243121 has 4 divisors (see below), whose sum is σ = 7298544. Its totient is φ = 7187700.

The previous prime is 7243111. The next prime is 7243129. The reversal of 7243121 is 1213427.

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 7243121 - 2¹⁸ = 6980977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7243093 and 7243102.

It is not an unprimeable number, because it can be changed into a prime (7243129) 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, 27515 + ... + 27776.

It is an arithmetic number, because the mean of its divisors is an integer number (1824636).

Almost surely, 2^7243121 is an apocalyptic number.

It is an amenable number.

7243121 is a deficient number, since it is larger than the sum of its proper divisors (55423).

7243121 is a wasteful number, since it uses less digits than its factorization.

7243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55422.

The product of its digits is 336, while the sum is 20.

The square root of 7243121 is about 2691.3047021844. The cubic root of 7243121 is about 193.4825994186.

Adding to 7243121 its reverse (1213427), we get a palindrome (8456548).

The spelling of 7243121 in words is "seven million, two hundred forty-three thousand, one hundred twenty-one".