1330181 has 4 divisors (see below), whose sum is σ = 1332492. Its totient is φ = 1327872.

The previous prime is 1330177. The next prime is 1330207. The reversal of 1330181 is 1810331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1810331 = 311 ⋅5821.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 348100 = 991^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330181 - 2² = 1330177 is a prime.

It is a super-2 number, since 2×1330181² = 3538762985522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330111) 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, 485 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (333123).

2^1330181 is an apocalyptic number.

It is an amenable number.

1330181 is a deficient number, since it is larger than the sum of its proper divisors (2311).

1330181 is a wasteful number, since it uses less digits than its factorization.

1330181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1330181 is about 1153.3347302496. The cubic root of 1330181 is about 109.9774333873.

The spelling of 1330181 in words is "one million, three hundred thirty thousand, one hundred eighty-one".