12661129 has 8 divisors (see below), whose sum is σ = 13736520. Its totient is φ = 11600256.

The previous prime is 12661123. The next prime is 12661147. The reversal of 12661129 is 92116621.

It can be written as a sum of positive squares in 4 ways, for example, as 23104 + 12638025 = 152^2 + 3555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12661129 - 2⁵ = 12661097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12661097 and 12661106.

It is not an unprimeable number, because it can be changed into a prime (12661123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (1717065).

Almost surely, 2^12661129 is an apocalyptic number.

It is an amenable number.

12661129 is a deficient number, since it is larger than the sum of its proper divisors (1075391).

12661129 is a wasteful number, since it uses less digits than its factorization.

12661129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259.

The product of its digits is 1296, while the sum is 28.

The square root of 12661129 is about 3558.2480239579. The cubic root of 12661129 is about 233.0723801485.

The spelling of 12661129 in words is "twelve million, six hundred sixty-one thousand, one hundred twenty-nine".