12534521 has 4 divisors (see below), whose sum is σ = 12545892. Its totient is φ = 12523152.

The previous prime is 12534461. The next prime is 12534523. The reversal of 12534521 is 12543521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9765625 + 2768896 = 3125^2 + 1664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12534521 is a prime.

It is a super-2 number, since 2×12534521² = 314228433398882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12534523) 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, 3830 + ... + 6303.

It is an arithmetic number, because the mean of its divisors is an integer number (3136473).

Almost surely, 2^12534521 is an apocalyptic number.

It is an amenable number.

12534521 is a deficient number, since it is larger than the sum of its proper divisors (11371).

12534521 is a wasteful number, since it uses less digits than its factorization.

12534521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370.

The product of its digits is 1200, while the sum is 23.

The square root of 12534521 is about 3540.4125465827. The cubic root of 12534521 is about 232.2928883614.

The spelling of 12534521 in words is "twelve million, five hundred thirty-four thousand, five hundred twenty-one".