12449819 has 4 divisors (see below), whose sum is σ = 12501720. Its totient is φ = 12397920.

The previous prime is 12449803. The next prime is 12449821. The reversal of 12449819 is 91894421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12449819 - 2⁴ = 12449803 is a prime.

It is a super-2 number, since 2×12449819² = 309995986265522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12449839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25589 + ... + 26070.

It is an arithmetic number, because the mean of its divisors is an integer number (3125430).

Almost surely, 2^12449819 is an apocalyptic number.

12449819 is a deficient number, since it is larger than the sum of its proper divisors (51901).

12449819 is an equidigital number, since it uses as much as digits as its factorization.

12449819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51900.

The product of its digits is 20736, while the sum is 38.

The square root of 12449819 is about 3528.4301041681. The cubic root of 12449819 is about 231.7684657474.

The spelling of 12449819 in words is "twelve million, four hundred forty-nine thousand, eight hundred nineteen".