128424213 has 12 divisors (see below), whose sum is σ = 186098380. Its totient is φ = 85340736.

The previous prime is 128424199. The next prime is 128424223. The reversal of 128424213 is 312424821.

128424213 is a `hidden beast` number, since 1 + 28 + 424 + 213 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10093329 + 118330884 = 3177^2 + 10878^2 .

It is not a de Polignac number, because 128424213 - 2⁸ = 128423957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128424223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19978 + ... + 25611.

Almost surely, 2^128424213 is an apocalyptic number.

It is an amenable number.

128424213 is a deficient number, since it is larger than the sum of its proper divisors (57674167).

128424213 is a wasteful number, since it uses less digits than its factorization.

128424213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45908 (or 45905 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 128424213 is about 11332.4407344579. The cubic root of 128424213 is about 504.5245507155.

The spelling of 128424213 in words is "one hundred twenty-eight million, four hundred twenty-four thousand, two hundred thirteen".