13128106 has 4 divisors (see below), whose sum is σ = 19692162. Its totient is φ = 6564052.

The previous prime is 13128103. The next prime is 13128139. The reversal of 13128106 is 60182131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60182131 = 307 ⋅196033.

It can be written as a sum of positive squares in only one way, i.e., 8946081 + 4182025 = 2991^2 + 2045^2 .

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (13128103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282025 + ... + 3282028.

Almost surely, 2^13128106 is an apocalyptic number.

13128106 is a deficient number, since it is larger than the sum of its proper divisors (6564056).

13128106 is an equidigital number, since it uses as much as digits as its factorization.

13128106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564055.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13128106 is about 3623.2728299150. The cubic root of 13128106 is about 235.9033047324.

The spelling of 13128106 in words is "thirteen million, one hundred twenty-eight thousand, one hundred six".