13128422 has 4 divisors (see below), whose sum is σ = 19692636. Its totient is φ = 6564210.

The previous prime is 13128419. The next prime is 13128431. The reversal of 13128422 is 22482131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282104 + ... + 3282107.

It is an arithmetic number, because the mean of its divisors is an integer number (4923159).

Almost surely, 2^13128422 is an apocalyptic number.

13128422 is a deficient number, since it is larger than the sum of its proper divisors (6564214).

13128422 is an equidigital number, since it uses as much as digits as its factorization.

13128422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6564213.

The product of its digits is 768, while the sum is 23.

The square root of 13128422 is about 3623.3164366365. The cubic root of 13128422 is about 235.9051974869.

The spelling of 13128422 in words is "thirteen million, one hundred twenty-eight thousand, four hundred twenty-two".