115467721 has 2 divisors, whose sum is σ = 115467722. Its totient is φ = 115467720.

The previous prime is 115467719. The next prime is 115467749. The reversal of 115467721 is 127764511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65610000 + 49857721 = 8100^2 + 7061^2 .

It is a cyclic number.

It is not a de Polignac number, because 115467721 - 2¹ = 115467719 is a prime.

Together with 115467719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115467221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57733860 + 57733861.

It is an arithmetic number, because the mean of its divisors is an integer number (57733861).

Almost surely, 2^115467721 is an apocalyptic number.

It is an amenable number.

115467721 is a deficient number, since it is larger than the sum of its proper divisors (1).

115467721 is an equidigital number, since it uses as much as digits as its factorization.

115467721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 115467721 is about 10745.5907701717. The cubic root of 115467721 is about 486.9527970137.

The spelling of 115467721 in words is "one hundred fifteen million, four hundred sixty-seven thousand, seven hundred twenty-one".