12500521 has 4 divisors (see below), whose sum is σ = 13636944. Its totient is φ = 11364100.

The previous prime is 12500519. The next prime is 12500539.

12500521 is nontrivially palindromic in base 10.

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 12500521 - 2¹ = 12500519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12500495 and 12500504.

It is not an unprimeable number, because it can be changed into a prime (12500581) 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, 568195 + ... + 568216.

It is an arithmetic number, because the mean of its divisors is an integer number (3409236).

Almost surely, 2^12500521 is an apocalyptic number.

12500521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12500521 is a deficient number, since it is larger than the sum of its proper divisors (1136423).

12500521 is a wasteful number, since it uses less digits than its factorization.

12500521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136422.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 12500521 is about 3535.6075856916. The cubic root of 12500521 is about 232.0826659929.

The spelling of 12500521 in words is "twelve million, five hundred thousand, five hundred twenty-one".