12172770 has 48 divisors (see below), whose sum is σ = 32677632. Its totient is φ = 3140640.

The previous prime is 12172763. The next prime is 12172789. The reversal of 12172770 is 7727121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (680784).

Almost surely, 2^12172770 is an apocalyptic number.

12172770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12172770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16338816).

12172770 is an abundant number, since it is smaller than the sum of its proper divisors (20504862).

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

12172770 is a wasteful number, since it uses less digits than its factorization.

12172770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407 (or 4404 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 12172770 is about 3488.9496986916. The cubic root of 12172770 is about 230.0363521621.

Adding to 12172770 its reverse (7727121), we get a palindrome (19899891).

The spelling of 12172770 in words is "twelve million, one hundred seventy-two thousand, seven hundred seventy".