12447998 has 4 divisors (see below), whose sum is σ = 18672000. Its totient is φ = 6223998.

The previous prime is 12447977. The next prime is 12448001. The reversal of 12447998 is 89974421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89974421 = 17 ⋅5292613.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3111998 + ... + 3112001.

It is an arithmetic number, because the mean of its divisors is an integer number (4668000).

Almost surely, 2^12447998 is an apocalyptic number.

12447998 is a deficient number, since it is larger than the sum of its proper divisors (6224002).

12447998 is an equidigital number, since it uses as much as digits as its factorization.

12447998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224001.

The product of its digits is 145152, while the sum is 44.

The square root of 12447998 is about 3528.1720479591. The cubic root of 12447998 is about 231.7571651560.

The spelling of 12447998 in words is "twelve million, four hundred forty-seven thousand, nine hundred ninety-eight".