128457012 has 12 divisors (see below), whose sum is σ = 299733056. Its totient is φ = 42819000.

The previous prime is 128456987. The next prime is 128457019. The reversal of 128457012 is 210754821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128457019) 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, 5352364 + ... + 5352387.

Almost surely, 2^128457012 is an apocalyptic number.

128457012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128457012 is an abundant number, since it is smaller than the sum of its proper divisors (171276044).

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

128457012 is a wasteful number, since it uses less digits than its factorization.

128457012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10704758 (or 10704756 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 128457012 is about 11333.8877707519. The cubic root of 128457012 is about 504.5674982039.

The spelling of 128457012 in words is "one hundred twenty-eight million, four hundred fifty-seven thousand, twelve".