7535521 has 4 divisors (see below), whose sum is σ = 8612032. Its totient is φ = 6459012.

The previous prime is 7535519. The next prime is 7535527. The reversal of 7535521 is 1255357.

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 7535521 - 2¹ = 7535519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7535521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7535527) 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, 538245 + ... + 538258.

It is an arithmetic number, because the mean of its divisors is an integer number (2153008).

Almost surely, 2^7535521 is an apocalyptic number.

It is an amenable number.

7535521 is a deficient number, since it is larger than the sum of its proper divisors (1076511).

7535521 is a wasteful number, since it uses less digits than its factorization.

7535521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076510.

The product of its digits is 5250, while the sum is 28.

The square root of 7535521 is about 2745.0903445971. The cubic root of 7535521 is about 196.0519177334.

The spelling of 7535521 in words is "seven million, five hundred thirty-five thousand, five hundred twenty-one".