12172030 has 32 divisors (see below), whose sum is σ = 23839200. Its totient is φ = 4447872.

The previous prime is 12172019. The next prime is 12172049. The reversal of 12172030 is 3027121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12171995 and 12172013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13741 + ... + 14599.

It is an arithmetic number, because the mean of its divisors is an integer number (744975).

Almost surely, 2^12172030 is an apocalyptic number.

12172030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12172030 is a deficient number, since it is larger than the sum of its proper divisors (11667170).

12172030 is a wasteful number, since it uses less digits than its factorization.

12172030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 12172030 is about 3488.8436479728. The cubic root of 12172030 is about 230.0316906553.

Adding to 12172030 its reverse (3027121), we get a palindrome (15199151).

The spelling of 12172030 in words is "twelve million, one hundred seventy-two thousand, thirty".