12172804 has 12 divisors (see below), whose sum is σ = 24345664. Its totient is φ = 5216904.

The previous prime is 12172789. The next prime is 12172807. The reversal of 12172804 is 40827121.

It is a happy number.

12172804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12172804 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12172807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217344 + ... + 217399.

Almost surely, 2^12172804 is an apocalyptic number.

12172804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12172804 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12172804 is a wasteful number, since it uses less digits than its factorization.

12172804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434754 (or 434752 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12172804 is about 3488.9545712147. The cubic root of 12172804 is about 230.0365663349.

Adding to 12172804 its reverse (40827121), we get a palindrome (52999925).

The spelling of 12172804 in words is "twelve million, one hundred seventy-two thousand, eight hundred four".