12281958 has 48 divisors (see below), whose sum is σ = 29090880. Its totient is φ = 3722112.

The previous prime is 12281947. The next prime is 12281963. The reversal of 12281958 is 85918221.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16723 + ... + 17441.

It is an arithmetic number, because the mean of its divisors is an integer number (606060).

Almost surely, 2^12281958 is an apocalyptic number.

12281958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12281958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14545440).

12281958 is an abundant number, since it is smaller than the sum of its proper divisors (16808922).

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

12281958 is a wasteful number, since it uses less digits than its factorization.

12281958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813 (or 810 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 12281958 is about 3504.5624548580. The cubic root of 12281958 is about 230.7221035559.

The spelling of 12281958 in words is "twelve million, two hundred eighty-one thousand, nine hundred fifty-eight".