7113521 has 4 divisors (see below), whose sum is σ = 7135344. Its totient is φ = 7091700.

The previous prime is 7113517. The next prime is 7113527. The reversal of 7113521 is 1253117.

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 an emirpimes, since its reverse is a distinct semiprime: 1253117 = 197 ⋅6361.

It is a cyclic number.

It is not a de Polignac number, because 7113521 - 2² = 7113517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7113493 and 7113502.

It is not an unprimeable number, because it can be changed into a prime (7113527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10415 + ... + 11076.

It is an arithmetic number, because the mean of its divisors is an integer number (1783836).

Almost surely, 2^7113521 is an apocalyptic number.

It is an amenable number.

7113521 is a deficient number, since it is larger than the sum of its proper divisors (21823).

7113521 is a wasteful number, since it uses less digits than its factorization.

7113521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21822.

The product of its digits is 210, while the sum is 20.

The square root of 7113521 is about 2667.1184825575. The cubic root of 7113521 is about 192.3216631368.

Adding to 7113521 its reverse (1253117), we get a palindrome (8366638).

The spelling of 7113521 in words is "seven million, one hundred thirteen thousand, five hundred twenty-one".