12905417 has 4 divisors (see below), whose sum is σ = 14749056. Its totient is φ = 11061780.

The previous prime is 12905413. The next prime is 12905423. The reversal of 12905417 is 71450921.

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: 71450921 = 71 ⋅1006351.

It is a cyclic number.

It is not a de Polignac number, because 12905417 - 2² = 12905413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12905417.

It is not an unprimeable number, because it can be changed into a prime (12905411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921809 + ... + 921822.

It is an arithmetic number, because the mean of its divisors is an integer number (3687264).

Almost surely, 2^12905417 is an apocalyptic number.

It is an amenable number.

12905417 is a deficient number, since it is larger than the sum of its proper divisors (1843639).

12905417 is an equidigital number, since it uses as much as digits as its factorization.

12905417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843638.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 12905417 is about 3592.4110288217. The cubic root of 12905417 is about 234.5618332949.

The spelling of 12905417 in words is "twelve million, nine hundred five thousand, four hundred seventeen".