12271998 has 8 divisors (see below), whose sum is σ = 24544008. Its totient is φ = 4090664.

The previous prime is 12271969. The next prime is 12271999. The reversal of 12271998 is 89917221.

It is a sphenic number, since it is the product of 3 distinct primes.

12271998 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12271999) 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, 1022661 + ... + 1022672.

It is an arithmetic number, because the mean of its divisors is an integer number (3068001).

Almost surely, 2^12271998 is an apocalyptic number.

12271998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12271998 is a wasteful number, since it uses less digits than its factorization.

12271998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045338.

The product of its digits is 18144, while the sum is 39.

The square root of 12271998 is about 3503.1411618717. The cubic root of 12271998 is about 230.6597189966.

The spelling of 12271998 in words is "twelve million, two hundred seventy-one thousand, nine hundred ninety-eight".