128252113 has 4 divisors (see below), whose sum is σ = 139911408. Its totient is φ = 116592820.

The previous prime is 128252099. The next prime is 128252119. The reversal of 128252113 is 311252821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 311252821 = 11 ⋅28295711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128252113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128252119) 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, 5829631 + ... + 5829652.

It is an arithmetic number, because the mean of its divisors is an integer number (34977852).

Almost surely, 2^128252113 is an apocalyptic number.

It is an amenable number.

128252113 is a deficient number, since it is larger than the sum of its proper divisors (11659295).

128252113 is a wasteful number, since it uses less digits than its factorization.

128252113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11659294.

The product of its digits is 960, while the sum is 25.

The square root of 128252113 is about 11324.8449437509. The cubic root of 128252113 is about 504.2990805384.

The spelling of 128252113 in words is "one hundred twenty-eight million, two hundred fifty-two thousand, one hundred thirteen".