1328172 has 12 divisors (see below), whose sum is σ = 3099096. Its totient is φ = 442720.

The previous prime is 1328167. The next prime is 1328179. The reversal of 1328172 is 2718231.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×1328172³ = 7028849037635233344, which contains 333 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1328179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55329 + ... + 55352.

It is an arithmetic number, because the mean of its divisors is an integer number (258258).

2^1328172 is an apocalyptic number.

1328172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1328172 is an abundant number, since it is smaller than the sum of its proper divisors (1770924).

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

1328172 is a wasteful number, since it uses less digits than its factorization.

1328172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110688 (or 110686 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 1328172 is about 1152.4634484442. The cubic root of 1328172 is about 109.9220384224.

The spelling of 1328172 in words is "one million, three hundred twenty-eight thousand, one hundred seventy-two".