12572121 has 4 divisors (see below), whose sum is σ = 16762832. Its totient is φ = 8381412.

The previous prime is 12572069. The next prime is 12572123. The reversal of 12572121 is 12127521.

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 12572121 - 2⁶ = 12572057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12572123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095351 + ... + 2095356.

It is an arithmetic number, because the mean of its divisors is an integer number (4190708).

Almost surely, 2^12572121 is an apocalyptic number.

It is an amenable number.

12572121 is a deficient number, since it is larger than the sum of its proper divisors (4190711).

12572121 is an equidigital number, since it uses as much as digits as its factorization.

12572121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190710.

The product of its digits is 280, while the sum is 21.

The square root of 12572121 is about 3545.7186859648. The cubic root of 12572121 is about 232.5249273770.

Adding to 12572121 its reverse (12127521), we get a palindrome (24699642).

The spelling of 12572121 in words is "twelve million, five hundred seventy-two thousand, one hundred twenty-one".