128456115 has 8 divisors (see below), whose sum is σ = 205529808. Its totient is φ = 68509920.

The previous prime is 128456113. The next prime is 128456137. The reversal of 128456115 is 511654821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128456115 - 2¹ = 128456113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128456113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4281856 + ... + 4281885.

It is an arithmetic number, because the mean of its divisors is an integer number (25691226).

Almost surely, 2^128456115 is an apocalyptic number.

128456115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128456115 is a deficient number, since it is larger than the sum of its proper divisors (77073693).

128456115 is an equidigital number, since it uses as much as digits as its factorization.

128456115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563749.

The product of its digits is 9600, while the sum is 33.

The square root of 128456115 is about 11333.8481990893. The cubic root of 128456115 is about 504.5663237562.

The spelling of 128456115 in words is "one hundred twenty-eight million, four hundred fifty-six thousand, one hundred fifteen".