128525245 has 8 divisors (see below), whose sum is σ = 159548760. Its totient is φ = 99274560.

The previous prime is 128525239. The next prime is 128525261. The reversal of 128525245 is 542525821.

It can be written as a sum of positive squares in 4 ways, for example, as 52678564 + 75846681 = 7258^2 + 8709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-128525245 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128525245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443046 + ... + 443335.

It is an arithmetic number, because the mean of its divisors is an integer number (19943595).

Almost surely, 2^128525245 is an apocalyptic number.

It is an amenable number.

128525245 is a deficient number, since it is larger than the sum of its proper divisors (31023515).

128525245 is an equidigital number, since it uses as much as digits as its factorization.

128525245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886415.

The product of its digits is 32000, while the sum is 34.

The square root of 128525245 is about 11336.8975032855. The cubic root of 128525245 is about 504.6568200701.

The spelling of 128525245 in words is "one hundred twenty-eight million, five hundred twenty-five thousand, two hundred forty-five".