12020172 has 24 divisors (see below), whose sum is σ = 28508592. Its totient is φ = 3940800.

The previous prime is 12020161. The next prime is 12020209. The reversal of 12020172 is 27102021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7479 + ... + 8942.

It is an arithmetic number, because the mean of its divisors is an integer number (1187858).

Almost surely, 2^12020172 is an apocalyptic number.

12020172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12020172 is an abundant number, since it is smaller than the sum of its proper divisors (16488420).

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

12020172 is a wasteful number, since it uses less digits than its factorization.

12020172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16489 (or 16487 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 12020172 is about 3467.0119699822. The cubic root of 12020172 is about 229.0710610052.

Adding to 12020172 its reverse (27102021), we get a palindrome (39122193).

The spelling of 12020172 in words is "twelve million, twenty thousand, one hundred seventy-two".