1331172 has 36 divisors (see below), whose sum is σ = 3407040. Its totient is φ = 438192.

The previous prime is 1331153. The next prime is 1331207. The reversal of 1331172 is 2711331.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3529 + ... + 3887.

It is an arithmetic number, because the mean of its divisors is an integer number (94640).

2^1331172 is an apocalyptic number.

1331172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1331172 is an abundant number, since it is smaller than the sum of its proper divisors (2075868).

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

1331172 is a wasteful number, since it uses less digits than its factorization.

1331172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 467 counting only the distinct ones).

The product of its digits is 126, while the sum is 18.

The square root of 1331172 is about 1153.7642740179. The cubic root of 1331172 is about 110.0047380879.

The spelling of 1331172 in words is "one million, three hundred thirty-one thousand, one hundred seventy-two".