128475015 has 16 divisors (see below), whose sum is σ = 206160768. Its totient is φ = 68319776.

The previous prime is 128474999. The next prime is 128475029. The reversal of 128475015 is 510574821.

It is a cyclic number.

It is not a de Polignac number, because 128475015 - 2⁴ = 128474999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7137 + ... + 17546.

It is an arithmetic number, because the mean of its divisors is an integer number (12885048).

Almost surely, 2^128475015 is an apocalyptic number.

128475015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128475015 is a deficient number, since it is larger than the sum of its proper divisors (77685753).

128475015 is a wasteful number, since it uses less digits than its factorization.

128475015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25038.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 128475015 is about 11334.6819540735. The cubic root of 128475015 is about 504.5910684868.

The spelling of 128475015 in words is "one hundred twenty-eight million, four hundred seventy-five thousand, fifteen".