180042725 has 6 divisors (see below), whose sum is σ = 223253010. Its totient is φ = 144034160.

The previous prime is 180042721. The next prime is 180042739. The reversal of 180042725 is 527240081.

It is a Cunningham number, because it is equal to 13418²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 180042724 = 1^2 + 13418^2 .

It is not a de Polignac number, because 180042725 - 2² = 180042721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180042721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3600830 + ... + 3600879.

It is an arithmetic number, because the mean of its divisors is an integer number (37208835).

Almost surely, 2^180042725 is an apocalyptic number.

It is an amenable number.

180042725 is a deficient number, since it is larger than the sum of its proper divisors (43210285).

180042725 is an equidigital number, since it uses as much as digits as its factorization.

180042725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7201719 (or 7201714 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 180042725 is about 13418.0000372634. Note that the first 4 decimals coincide. The cubic root of 180042725 is about 564.6662868660. Note that the first 3 decimals are identical.

The spelling of 180042725 in words is "one hundred eighty million, forty-two thousand, seven hundred twenty-five".