128212252 has 24 divisors (see below), whose sum is σ = 263357024. Its totient is φ = 53462592.

The previous prime is 128212229. The next prime is 128212261. The reversal of 128212252 is 252212821.

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, 60843 + ... + 62914.

Almost surely, 2^128212252 is an apocalyptic number.

It is an amenable number.

128212252 is an abundant number, since it is smaller than the sum of its proper divisors (135144772).

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

128212252 is a wasteful number, since it uses less digits than its factorization.

128212252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123805 (or 123803 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 128212252 is about 11323.0849153400. The cubic root of 128212252 is about 504.2468294211.

The spelling of 128212252 in words is "one hundred twenty-eight million, two hundred twelve thousand, two hundred fifty-two".