180242549 has 2 divisors, whose sum is σ = 180242550. Its totient is φ = 180242548.

The previous prime is 180242539. The next prime is 180242561. The reversal of 180242549 is 945242081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100140049 + 80102500 = 10007^2 + 8950^2 .

It is a cyclic number.

It is not a de Polignac number, because 180242549 - 2²⁴ = 163465333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180242539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90121274 + 90121275.

It is an arithmetic number, because the mean of its divisors is an integer number (90121275).

Almost surely, 2^180242549 is an apocalyptic number.

It is an amenable number.

180242549 is a deficient number, since it is larger than the sum of its proper divisors (1).

180242549 is an equidigital number, since it uses as much as digits as its factorization.

180242549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 180242549 is about 13425.4440894892. Note that the first 3 decimals coincide. The cubic root of 180242549 is about 564.8751116661.

The spelling of 180242549 in words is "one hundred eighty million, two hundred forty-two thousand, five hundred forty-nine".