12209481 has 16 divisors (see below), whose sum is σ = 18875520. Its totient is φ = 7785360.

The previous prime is 12209479. The next prime is 12209501. The reversal of 12209481 is 18490221.

12209481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12209481 - 2¹ = 12209479 is a prime.

It is a super-2 number, since 2×12209481² = 298142852578722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12209441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9210 + ... + 10451.

It is an arithmetic number, because the mean of its divisors is an integer number (1179720).

Almost surely, 2^12209481 is an apocalyptic number.

It is an amenable number.

12209481 is a deficient number, since it is larger than the sum of its proper divisors (6666039).

12209481 is a wasteful number, since it uses less digits than its factorization.

12209481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19693 (or 19687 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12209481 is about 3494.2067769381. The cubic root of 12209481 is about 230.2673702266.

It can be divided in two parts, 1220 and 9481, that added together give a palindrome (10701).

The spelling of 12209481 in words is "twelve million, two hundred nine thousand, four hundred eighty-one".