12692129 has 2 divisors, whose sum is σ = 12692130. Its totient is φ = 12692128.

The previous prime is 12692123. The next prime is 12692131. The reversal of 12692129 is 92129621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8133904 + 4558225 = 2852^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 12692129 - 2¹² = 12688033 is a prime.

It is a super-2 number, since 2×12692129² = 322180277105282, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12692131, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12692095 and 12692104.

It is not a weakly prime, because it can be changed into another prime (12692123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6346064 + 6346065.

It is an arithmetic number, because the mean of its divisors is an integer number (6346065).

Almost surely, 2^12692129 is an apocalyptic number.

It is an amenable number.

12692129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12692129 is an equidigital number, since it uses as much as digits as its factorization.

12692129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 12692129 is about 3562.6014371524. The cubic root of 12692129 is about 233.2624462670.

It can be divided in two parts, 12692 and 129, that added together give a palindrome (12821).

The spelling of 12692129 in words is "twelve million, six hundred ninety-two thousand, one hundred twenty-nine".