180744121 has 2 divisors, whose sum is σ = 180744122. Its totient is φ = 180744120.

The previous prime is 180744107. The next prime is 180744173. The reversal of 180744121 is 121447081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96746896 + 83997225 = 9836^2 + 9165^2 .

It is a cyclic number.

It is not a de Polignac number, because 180744121 - 2²¹ = 178646969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180744121.

It is not a weakly prime, because it can be changed into another prime (180744191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90372060 + 90372061.

It is an arithmetic number, because the mean of its divisors is an integer number (90372061).

Almost surely, 2^180744121 is an apocalyptic number.

It is an amenable number.

180744121 is a deficient number, since it is larger than the sum of its proper divisors (1).

180744121 is an equidigital number, since it uses as much as digits as its factorization.

180744121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 180744121 is about 13444.1110156083. Note that the first 3 decimals coincide. The cubic root of 180744121 is about 565.3985972647.

The spelling of 180744121 in words is "one hundred eighty million, seven hundred forty-four thousand, one hundred twenty-one".