11728129 has 4 divisors (see below), whose sum is σ = 13403584. Its totient is φ = 10052676.

The previous prime is 11728127. The next prime is 11728141. The reversal of 11728129 is 92182711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92182711 = 431 ⋅213881.

It is a cyclic number.

It is not a de Polignac number, because 11728129 - 2¹ = 11728127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11728129.

It is not an unprimeable number, because it can be changed into a prime (11728127) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 837717 + ... + 837730.

It is an arithmetic number, because the mean of its divisors is an integer number (3350896).

Almost surely, 2^11728129 is an apocalyptic number.

It is an amenable number.

11728129 is a deficient number, since it is larger than the sum of its proper divisors (1675455).

11728129 is an equidigital number, since it uses as much as digits as its factorization.

11728129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675454.

The product of its digits is 2016, while the sum is 31.

The square root of 11728129 is about 3424.6356010531. The cubic root of 11728129 is about 227.2006544752.

The spelling of 11728129 in words is "eleven million, seven hundred twenty-eight thousand, one hundred twenty-nine".