12449818 has 4 divisors (see below), whose sum is σ = 18674730. Its totient is φ = 6224908.

The previous prime is 12449803. The next prime is 12449821. The reversal of 12449818 is 81894421.

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

It can be written as a sum of positive squares in only one way, i.e., 9815689 + 2634129 = 3133^2 + 1623^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3112453 + ... + 3112456.

Almost surely, 2^12449818 is an apocalyptic number.

12449818 is a deficient number, since it is larger than the sum of its proper divisors (6224912).

12449818 is an equidigital number, since it uses as much as digits as its factorization.

12449818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6224911.

The product of its digits is 18432, while the sum is 37.

The square root of 12449818 is about 3528.4299624621. The cubic root of 12449818 is about 231.7684595420.

The spelling of 12449818 in words is "twelve million, four hundred forty-nine thousand, eight hundred eighteen".