12905219 has 2 divisors, whose sum is σ = 12905220. Its totient is φ = 12905218.

The previous prime is 12905209. The next prime is 12905251. The reversal of 12905219 is 91250921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12905219 is a prime.

It is a super-2 number, since 2×12905219² = 333089354875922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12905191 and 12905200.

It is not a weakly prime, because it can be changed into another prime (12905209) 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, 6452609 + 6452610.

It is an arithmetic number, because the mean of its divisors is an integer number (6452610).

Almost surely, 2^12905219 is an apocalyptic number.

12905219 is a deficient number, since it is larger than the sum of its proper divisors (1).

12905219 is an equidigital number, since it uses as much as digits as its factorization.

12905219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 12905219 is about 3592.3834706223. The cubic root of 12905219 is about 234.5606337087.

The spelling of 12905219 in words is "twelve million, nine hundred five thousand, two hundred nineteen".