12575521 has 4 divisors (see below), whose sum is σ = 14372032. Its totient is φ = 10779012.

The previous prime is 12575513. The next prime is 12575527. The reversal of 12575521 is 12557521.

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 12575521 - 2³ = 12575513 is a prime.

It is a super-3 number, since 3×12575521³ (a number of 22 digits) contains 333 as substring.

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 12575521.

It is not an unprimeable number, because it can be changed into a prime (12575527) 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, 898245 + ... + 898258.

It is an arithmetic number, because the mean of its divisors is an integer number (3593008).

Almost surely, 2^12575521 is an apocalyptic number.

It is an amenable number.

12575521 is a deficient number, since it is larger than the sum of its proper divisors (1796511).

12575521 is an equidigital number, since it uses as much as digits as its factorization.

12575521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796510.

The product of its digits is 3500, while the sum is 28.

The square root of 12575521 is about 3546.1981050133. The cubic root of 12575521 is about 232.5458868077.

The spelling of 12575521 in words is "twelve million, five hundred seventy-five thousand, five hundred twenty-one".