201230705 has 16 divisors (see below), whose sum is σ = 263620560. Its totient is φ = 146562048.

The previous prime is 201230693. The next prime is 201230707. The reversal of 201230705 is 507032102.

It can be written as a sum of positive squares in 8 ways, for example, as 3659569 + 197571136 = 1913^2 + 14056^2 .

It is a cyclic number.

It is not a de Polignac number, because 201230705 - 2²² = 197036401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201230707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16460 + ... + 25949.

It is an arithmetic number, because the mean of its divisors is an integer number (16476285).

Almost surely, 2^201230705 is an apocalyptic number.

It is an amenable number.

201230705 is a deficient number, since it is larger than the sum of its proper divisors (62389855).

201230705 is a wasteful number, since it uses less digits than its factorization.

201230705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42500.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 201230705 is about 14185.5808834182. The cubic root of 201230705 is about 586.0006299814. Note that the first 3 decimals are identical.

Adding to 201230705 its reverse (507032102), we get a palindrome (708262807).

The spelling of 201230705 in words is "two hundred one million, two hundred thirty thousand, seven hundred five".