12281951 has 4 divisors (see below), whose sum is σ = 13398504. Its totient is φ = 11165400.

The previous prime is 12281947. The next prime is 12281963. The reversal of 12281951 is 15918221.

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 12281951 - 2² = 12281947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12281981) 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, 558260 + ... + 558281.

It is an arithmetic number, because the mean of its divisors is an integer number (3349626).

Almost surely, 2^12281951 is an apocalyptic number.

12281951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12281951 is a deficient number, since it is larger than the sum of its proper divisors (1116553).

12281951 is a wasteful number, since it uses less digits than its factorization.

12281951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116552.

The product of its digits is 1440, while the sum is 29.

The square root of 12281951 is about 3504.5614561597. The cubic root of 12281951 is about 230.7220597232.

The spelling of 12281951 in words is "twelve million, two hundred eighty-one thousand, nine hundred fifty-one".