128499165 has 24 divisors (see below), whose sum is σ = 223430688. Its totient is φ = 68317920.

The previous prime is 128499157. The next prime is 128499167. The reversal of 128499165 is 561994821.

It is not a de Polignac number, because 128499165 - 2³ = 128499157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 128499165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128499167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10582 + ... + 19208.

It is an arithmetic number, because the mean of its divisors is an integer number (9309612).

Almost surely, 2^128499165 is an apocalyptic number.

128499165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128499165 is a deficient number, since it is larger than the sum of its proper divisors (94931523).

128499165 is a wasteful number, since it uses less digits than its factorization.

128499165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8969 (or 8966 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 128499165 is about 11335.7472184237. The cubic root of 128499165 is about 504.6226832223.

The spelling of 128499165 in words is "one hundred twenty-eight million, four hundred ninety-nine thousand, one hundred sixty-five".