128825415 has 48 divisors (see below), whose sum is σ = 245306880. Its totient is φ = 62251200.

The previous prime is 128825407. The next prime is 128825423. The reversal of 128825415 is 514528821.

It is an interprime number because it is at equal distance from previous prime (128825407) and next prime (128825423).

Together with 116481464 it forms a betrothed pair.

It is not a de Polignac number, because 128825415 - 2³ = 128825407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128825415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16390 + ... + 22940.

It is an arithmetic number, because the mean of its divisors is an integer number (5110560).

Almost surely, 2^128825415 is an apocalyptic number.

128825415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128825415 is a deficient number, since it is larger than the sum of its proper divisors (116481465).

128825415 is a wasteful number, since it uses less digits than its factorization.

128825415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604 (or 6601 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 128825415 is about 11350.1284133705. The cubic root of 128825415 is about 505.0493890199.

The spelling of 128825415 in words is "one hundred twenty-eight million, eight hundred twenty-five thousand, four hundred fifteen".