12522521 has 4 divisors (see below), whose sum is σ = 13660944. Its totient is φ = 11384100.

The previous prime is 12522487. The next prime is 12522529.

It is a happy number.

12522521 is nontrivially palindromic in base 10.

12522521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 12522521 - 2⁶ = 12522457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12522493 and 12522502.

It is not an unprimeable number, because it can be changed into a prime (12522529) 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, 569195 + ... + 569216.

It is an arithmetic number, because the mean of its divisors is an integer number (3415236).

Almost surely, 2^12522521 is an apocalyptic number.

12522521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12522521 is a deficient number, since it is larger than the sum of its proper divisors (1138423).

12522521 is a wasteful number, since it uses less digits than its factorization.

12522521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138422.

The product of its digits is 400, while the sum is 20.

The square root of 12522521 is about 3538.7174230221. The cubic root of 12522521 is about 232.2187356892.

It can be divided in two parts, 1252 and 2521, that added together give a palindrome (3773).

The spelling of 12522521 in words is "twelve million, five hundred twenty-two thousand, five hundred twenty-one".