7241521 has 4 divisors (see below), whose sum is σ = 8276032. Its totient is φ = 6207012.

The previous prime is 7241519. The next prime is 7241537. The reversal of 7241521 is 1251427.

It is a happy number.

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 not a de Polignac number, because 7241521 - 2¹ = 7241519 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7241492 and 7241501.

It is not an unprimeable number, because it can be changed into a prime (7241551) 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, 517245 + ... + 517258.

It is an arithmetic number, because the mean of its divisors is an integer number (2069008).

Almost surely, 2^7241521 is an apocalyptic number.

It is an amenable number.

7241521 is a deficient number, since it is larger than the sum of its proper divisors (1034511).

7241521 is a wasteful number, since it uses less digits than its factorization.

7241521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034510.

The product of its digits is 560, while the sum is 22.

The square root of 7241521 is about 2691.0074321711. The cubic root of 7241521 is about 193.4683516490.

Adding to 7241521 its reverse (1251427), we get a palindrome (8492948).

The spelling of 7241521 in words is "seven million, two hundred forty-one thousand, five hundred twenty-one".