7534521 has 12 divisors (see below), whose sum is σ = 10932948. Its totient is φ = 5000064.

The previous prime is 7534511. The next prime is 7534601. The reversal of 7534521 is 1254357.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1946025 + 5588496 = 1395^2 + 2364^2 .

It is not a de Polignac number, because 7534521 - 2⁵ = 7534489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7534511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (911079).

Almost surely, 2^7534521 is an apocalyptic number.

It is an amenable number.

7534521 is a deficient number, since it is larger than the sum of its proper divisors (3398427).

7534521 is a wasteful number, since it uses less digits than its factorization.

7534521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832 (or 3829 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 7534521 is about 2744.9081951861. The cubic root of 7534521 is about 196.0432450045.

Adding to 7534521 its reverse (1254357), we get a palindrome (8788878).

It can be divided in two parts, 75 and 34521, that added together give a square (34596 = 186²).

The spelling of 7534521 in words is "seven million, five hundred thirty-four thousand, five hundred twenty-one".