128251264 has 48 divisors (see below), whose sum is σ = 271492380. Its totient is φ = 60336128.

The previous prime is 128251231. The next prime is 128251313. The reversal of 128251264 is 462152821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35259 + ... + 38725.

Almost surely, 2^128251264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128251264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135746190).

128251264 is an abundant number, since it is smaller than the sum of its proper divisors (143241116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128251264 is an equidigital number, since it uses as much as digits as its factorization.

128251264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515 (or 3486 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 128251264 is about 11324.8074597319. The cubic root of 128251264 is about 504.2979677539.

The spelling of 128251264 in words is "one hundred twenty-eight million, two hundred fifty-one thousand, two hundred sixty-four".