115630721 has 2 divisors, whose sum is σ = 115630722. Its totient is φ = 115630720.

The previous prime is 115630717. The next prime is 115630747. The reversal of 115630721 is 127036511.

It is an a-pointer prime, because the next prime (115630747) can be obtained adding 115630721 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95335696 + 20295025 = 9764^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 115630721 - 2² = 115630717 is a prime.

It is not a weakly prime, because it can be changed into another prime (115630771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57815360 + 57815361.

It is an arithmetic number, because the mean of its divisors is an integer number (57815361).

Almost surely, 2^115630721 is an apocalyptic number.

It is an amenable number.

115630721 is a deficient number, since it is larger than the sum of its proper divisors (1).

115630721 is an equidigital number, since it uses as much as digits as its factorization.

115630721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 115630721 is about 10753.1726016093. The cubic root of 115630721 is about 487.1818249053.

The spelling of 115630721 in words is "one hundred fifteen million, six hundred thirty thousand, seven hundred twenty-one".