12952221 has 4 divisors (see below), whose sum is σ = 17269632. Its totient is φ = 8634812.

The previous prime is 12952207. The next prime is 12952229. The reversal of 12952221 is 12225921.

12952221 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 12952221 - 2⁵ = 12952189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12952191 and 12952200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12952229) 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, 2158701 + ... + 2158706.

It is an arithmetic number, because the mean of its divisors is an integer number (4317408).

Almost surely, 2^12952221 is an apocalyptic number.

It is an amenable number.

12952221 is a deficient number, since it is larger than the sum of its proper divisors (4317411).

12952221 is an equidigital number, since it uses as much as digits as its factorization.

12952221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317410.

The product of its digits is 720, while the sum is 24.

The square root of 12952221 is about 3598.9194211596. The cubic root of 12952221 is about 234.8450525280.

The spelling of 12952221 in words is "twelve million, nine hundred fifty-two thousand, two hundred twenty-one".