12541221 has 24 divisors (see below), whose sum is σ = 22586304. Its totient is φ = 6514560.

The previous prime is 12541211. The next prime is 12541229. The reversal of 12541221 is 12214521.

It is not a de Polignac number, because 12541221 - 2⁶ = 12541157 is a prime.

It is a super-3 number, since 3×12541221³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12541194 and 12541203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8356 + ... + 9741.

It is an arithmetic number, because the mean of its divisors is an integer number (941096).

Almost surely, 2^12541221 is an apocalyptic number.

12541221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12541221 is a deficient number, since it is larger than the sum of its proper divisors (10045083).

12541221 is a wasteful number, since it uses less digits than its factorization.

12541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18121 (or 18118 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12541221 is about 3541.3586375853. The cubic root of 12541221 is about 232.3342696829.

Adding to 12541221 its reverse (12214521), we get a palindrome (24755742).

The spelling of 12541221 in words is "twelve million, five hundred forty-one thousand, two hundred twenty-one".