128413 has 2 divisors, whose sum is σ = 128414. Its totient is φ = 128412.

The previous prime is 128411. The next prime is 128431. The reversal of 128413 is 314821.

Together with next prime (128431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116964 + 11449 = 342^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 128413 - 2¹ = 128411 is a prime.

Together with 128411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64206 + 64207.

It is an arithmetic number, because the mean of its divisors is an integer number (64207).

2¹²⁸⁴¹³ is an apocalyptic number.

It is an amenable number.

128413 is a deficient number, since it is larger than the sum of its proper divisors (1).

128413 is an equidigital number, since it uses as much as digits as its factorization.

128413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 128413 is about 358.3475966154. The cubic root of 128413 is about 50.4509866573.

The spelling of 128413 in words is "one hundred twenty-eight thousand, four hundred thirteen".