12211845 has 16 divisors (see below), whose sum is σ = 19682880. Its totient is φ = 6465024.

The previous prime is 12211841. The next prime is 12211847. The reversal of 12211845 is 54811221.

12211845 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 12211845 - 2² = 12211841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211841) 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, 844 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (1230180).

Almost surely, 2^12211845 is an apocalyptic number.

12211845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12211845 is a deficient number, since it is larger than the sum of its proper divisors (7471035).

12211845 is a wasteful number, since it uses less digits than its factorization.

12211845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004.

The product of its digits is 640, while the sum is 24.

The square root of 12211845 is about 3494.5450347649. The cubic root of 12211845 is about 230.2822307255.

The spelling of 12211845 in words is "twelve million, two hundred eleven thousand, eight hundred forty-five".