128097225 has 18 divisors (see below), whose sum is σ = 229436766. Its totient is φ = 68318400.

The previous prime is 128097217. The next prime is 128097253. The reversal of 128097225 is 522790821.

It can be written as a sum of positive squares in 3 ways, for example, as 45369 + 128051856 = 213^2 + 11316^2 .

It is not a de Polignac number, because 128097225 - 2³ = 128097217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128097225.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 284436 + ... + 284885.

It is an arithmetic number, because the mean of its divisors is an integer number (12746487).

Almost surely, 2^128097225 is an apocalyptic number.

128097225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128097225 is a deficient number, since it is larger than the sum of its proper divisors (101339541).

128097225 is a wasteful number, since it uses less digits than its factorization.

128097225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569337 (or 569329 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 128097225 is about 11318.0044619182. The cubic root of 128097225 is about 504.0959874813.

The spelling of 128097225 in words is "one hundred twenty-eight million, ninety-seven thousand, two hundred twenty-five".