12129419 has 2 divisors, whose sum is σ = 12129420. Its totient is φ = 12129418.

The previous prime is 12129407. The next prime is 12129473. The reversal of 12129419 is 91492121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12129419 is a prime.

It is a super-2 number, since 2×12129419² = 294245610555122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12129391 and 12129400.

It is not a weakly prime, because it can be changed into another prime (12129499) 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 as a sum of consecutive naturals, namely, 6064709 + 6064710.

It is an arithmetic number, because the mean of its divisors is an integer number (6064710).

Almost surely, 2^12129419 is an apocalyptic number.

12129419 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129419 is an equidigital number, since it uses as much as digits as its factorization.

12129419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 12129419 is about 3482.7315429128. The cubic root of 12129419 is about 229.7629504758.

The spelling of 12129419 in words is "twelve million, one hundred twenty-nine thousand, four hundred nineteen".