180420745 has 32 divisors (see below), whose sum is σ = 241794720. Its totient is φ = 128593920.

The previous prime is 180420743. The next prime is 180420767. The reversal of 180420745 is 547024081.

It can be written as a sum of positive squares in 16 ways, for example, as 7997584 + 172423161 = 2828^2 + 13131^2 .

It is not a de Polignac number, because 180420745 - 2¹ = 180420743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180420743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129955 + ... + 131335.

It is an arithmetic number, because the mean of its divisors is an integer number (7556085).

Almost surely, 2^180420745 is an apocalyptic number.

It is an amenable number.

180420745 is a deficient number, since it is larger than the sum of its proper divisors (61373975).

180420745 is a wasteful number, since it uses less digits than its factorization.

180420745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 180420745 is about 13432.0789530139. The cubic root of 180420745 is about 565.0612041145.

The spelling of 180420745 in words is "one hundred eighty million, four hundred twenty thousand, seven hundred forty-five".