12645419 has 2 divisors, whose sum is σ = 12645420. Its totient is φ = 12645418.

The previous prime is 12645403. The next prime is 12645439. The reversal of 12645419 is 91454621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12645419 - 2⁴ = 12645403 is a prime.

It is a super-2 number, since 2×12645419² = 319813243371122, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12645439) 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, 6322709 + 6322710.

It is an arithmetic number, because the mean of its divisors is an integer number (6322710).

Almost surely, 2^12645419 is an apocalyptic number.

12645419 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645419 is an equidigital number, since it uses as much as digits as its factorization.

12645419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 12645419 is about 3556.0397916784. The cubic root of 12645419 is about 232.9759410771.

The spelling of 12645419 in words is "twelve million, six hundred forty-five thousand, four hundred nineteen".