181061 has 2 divisors, whose sum is σ = 181062. Its totient is φ = 181060.

The previous prime is 181039. The next prime is 181063. The reversal of 181061 is 160181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 8836 = 415^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 181061 - 2¹⁴ = 164677 is a prime.

Together with 181063, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90530 + 90531.

It is an arithmetic number, because the mean of its divisors is an integer number (90531).

2¹⁸¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

181061 is a deficient number, since it is larger than the sum of its proper divisors (1).

181061 is an equidigital number, since it uses as much as digits as its factorization.

181061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 181061 is about 425.5126320099. The cubic root of 181061 is about 56.5728821637.

The spelling of 181061 in words is "one hundred eighty-one thousand, sixty-one".