128856253 has 4 divisors (see below), whose sum is σ = 129568348. Its totient is φ = 128144160.

The previous prime is 128856199. The next prime is 128856263. The reversal of 128856253 is 352658821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34727449 + 94128804 = 5893^2 + 9702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128856253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128856263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355776 + ... + 356137.

It is an arithmetic number, because the mean of its divisors is an integer number (32392087).

Almost surely, 2^128856253 is an apocalyptic number.

It is an amenable number.

128856253 is a deficient number, since it is larger than the sum of its proper divisors (712095).

128856253 is an equidigital number, since it uses as much as digits as its factorization.

128856253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712094.

The product of its digits is 115200, while the sum is 40.

The square root of 128856253 is about 11351.4868189150. The cubic root of 128856253 is about 505.0896850812.

The spelling of 128856253 in words is "one hundred twenty-eight million, eight hundred fifty-six thousand, two hundred fifty-three".