12172032 has 90 divisors (see below), whose sum is σ = 36356628. Its totient is φ = 4050432.

The previous prime is 12172019. The next prime is 12172049. The reversal of 12172032 is 23027121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12171996 and 12172014.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 20443 + ... + 21029.

Almost surely, 2^12172032 is an apocalyptic number.

12172032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12172032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18178314).

12172032 is an abundant number, since it is smaller than the sum of its proper divisors (24184596).

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

12172032 is an frugal number, since it uses more digits than its factorization.

12172032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12172032 is about 3488.8439346007. The cubic root of 12172032 is about 230.0317032543.

Adding to 12172032 its reverse (23027121), we get a palindrome (35199153).

It can be divided in two parts, 1217 and 2032, that added together give a square (3249 = 57²).

The spelling of 12172032 in words is "twelve million, one hundred seventy-two thousand, thirty-two".