1152382181 has 4 divisors (see below), whose sum is σ = 1152459852. Its totient is φ = 1152304512.

The previous prime is 1152382177. The next prime is 1152382201. The reversal of 1152382181 is 1812832511.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 833188225 + 319193956 = 28865^2 + 17866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152382181 - 2² = 1152382177 is a prime.

It is a super-2 number, since 2×1152382181² = 2655969382172633522, 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 (1152382081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8876 + ... + 48821.

It is an arithmetic number, because the mean of its divisors is an integer number (288114963).

Almost surely, 2^1152382181 is an apocalyptic number.

It is an amenable number.

1152382181 is a deficient number, since it is larger than the sum of its proper divisors (77671).

1152382181 is an equidigital number, since it uses as much as digits as its factorization.

1152382181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77670.

The product of its digits is 3840, while the sum is 32.

The square root of 1152382181 is about 33946.7550879315. The cubic root of 1152382181 is about 1048.4124705106.

The spelling of 1152382181 in words is "one billion, one hundred fifty-two million, three hundred eighty-two thousand, one hundred eighty-one".