128472513 has 16 divisors (see below), whose sum is σ = 184679040. Its totient is φ = 78971904.

The previous prime is 128472499. The next prime is 128472529. The reversal of 128472513 is 315274821.

It is not a de Polignac number, because 128472513 - 2⁴ = 128472497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128472563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59745 + ... + 61857.

It is an arithmetic number, because the mean of its divisors is an integer number (11542440).

Almost surely, 2^128472513 is an apocalyptic number.

128472513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128472513 is a deficient number, since it is larger than the sum of its proper divisors (56206527).

128472513 is a wasteful number, since it uses less digits than its factorization.

128472513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688.

The product of its digits is 13440, while the sum is 33.

The square root of 128472513 is about 11334.5715843167. The cubic root of 128472513 is about 504.5877928952.

The spelling of 128472513 in words is "one hundred twenty-eight million, four hundred seventy-two thousand, five hundred thirteen".