12919281 has 8 divisors (see below), whose sum is σ = 17781504. Its totient is φ = 8334960.

The previous prime is 12919273. The next prime is 12919301. The reversal of 12919281 is 18291921.

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

It is not a de Polignac number, because 12919281 - 2³ = 12919273 is a prime.

It is a super-2 number, since 2×12919281² = 333815643113922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12919211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69366 + ... + 69551.

It is an arithmetic number, because the mean of its divisors is an integer number (2222688).

Almost surely, 2^12919281 is an apocalyptic number.

It is an amenable number.

12919281 is a deficient number, since it is larger than the sum of its proper divisors (4862223).

12919281 is a wasteful number, since it uses less digits than its factorization.

12919281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138951.

The product of its digits is 2592, while the sum is 33.

The square root of 12919281 is about 3594.3401341554. The cubic root of 12919281 is about 234.6457980736.

The spelling of 12919281 in words is "twelve million, nine hundred nineteen thousand, two hundred eighty-one".