128421076 has 24 divisors (see below), whose sum is σ = 270361280. Its totient is φ = 52140672.

The previous prime is 128421071. The next prime is 128421103. The reversal of 128421076 is 670124821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128421071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120165 + ... + 121228.

Almost surely, 2^128421076 is an apocalyptic number.

It is an amenable number.

128421076 is an abundant number, since it is smaller than the sum of its proper divisors (141940204).

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

128421076 is a wasteful number, since it uses less digits than its factorization.

128421076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241423 (or 241421 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 128421076 is about 11332.3023256530. The cubic root of 128421076 is about 504.5204426989.

Adding to 128421076 its reverse (670124821), we get a palindrome (798545897).

The spelling of 128421076 in words is "one hundred twenty-eight million, four hundred twenty-one thousand, seventy-six".