1328181 has 8 divisors (see below), whose sum is σ = 1848000. Its totient is φ = 846912.

The previous prime is 1328179. The next prime is 1328183. The reversal of 1328181 is 1818231.

It is an interprime number because it is at equal distance from previous prime (1328179) and next prime (1328183).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1328181 - 2¹ = 1328179 is a prime.

It is a super-2 number, since 2×1328181² = 3528129537522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9556 + ... + 9693.

It is an arithmetic number, because the mean of its divisors is an integer number (231000).

2^1328181 is an apocalyptic number.

It is an amenable number.

1328181 is a deficient number, since it is larger than the sum of its proper divisors (519819).

1328181 is a wasteful number, since it uses less digits than its factorization.

1328181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19275.

The product of its digits is 384, while the sum is 24.

The square root of 1328181 is about 1152.4673531168. The cubic root of 1328181 is about 109.9222867075.

The spelling of 1328181 in words is "one million, three hundred twenty-eight thousand, one hundred eighty-one".