181057 has 4 divisors (see below), whose sum is σ = 181936. Its totient is φ = 180180.

The previous prime is 181039. The next prime is 181061. The reversal of 181057 is 750181.

181057 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 750181 = 89 ⋅8429.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181057 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181057.

It is not an unprimeable number, because it can be changed into a prime (181087) 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, 58 + ... + 604.

It is an arithmetic number, because the mean of its divisors is an integer number (45484).

2¹⁸¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

181057 is a deficient number, since it is larger than the sum of its proper divisors (879).

181057 is an equidigital number, since it uses as much as digits as its factorization.

181057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 181057 is about 425.5079317710. The cubic root of 181057 is about 56.5724655579.

The spelling of 181057 in words is "one hundred eighty-one thousand, fifty-seven".