115720005 has 16 divisors (see below), whose sum is σ = 191537280. Its totient is φ = 59588928.

The previous prime is 115719991. The next prime is 115720019. The reversal of 115720005 is 500027511.

It is an interprime number because it is at equal distance from previous prime (115719991) and next prime (115720019).

It is not a de Polignac number, because 115720005 - 2⁶ = 115719941 is a prime.

It is a super-2 number, since 2×115720005² = 26782239114400050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 132577 + ... + 133446.

It is an arithmetic number, because the mean of its divisors is an integer number (11971080).

Almost surely, 2^115720005 is an apocalyptic number.

115720005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115720005 is a deficient number, since it is larger than the sum of its proper divisors (75817275).

115720005 is a wasteful number, since it uses less digits than its factorization.

115720005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266060.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 115720005 is about 10757.3233194880. The cubic root of 115720005 is about 487.3071847606.

Adding to 115720005 its reverse (500027511), we get a palindrome (615747516).

The spelling of 115720005 in words is "one hundred fifteen million, seven hundred twenty thousand, five".