12211752 has 32 divisors (see below), whose sum is σ = 34891200. Its totient is φ = 3489024.

The previous prime is 12211751. The next prime is 12211757. The reversal of 12211752 is 25711221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12211751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36177 + ... + 36512.

It is an arithmetic number, because the mean of its divisors is an integer number (1090350).

Almost surely, 2^12211752 is an apocalyptic number.

12211752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12211752 is an abundant number, since it is smaller than the sum of its proper divisors (22679448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12211752 is a wasteful number, since it uses less digits than its factorization.

12211752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72705 (or 72701 counting only the distinct ones).

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

The square root of 12211752 is about 3494.5317282864. The cubic root of 12211752 is about 230.2816461482.

Adding to 12211752 its reverse (25711221), we get a palindrome (37922973).

The spelling of 12211752 in words is "twelve million, two hundred eleven thousand, seven hundred fifty-two".