12281567 has 4 divisors (see below), whose sum is σ = 12396456. Its totient is φ = 12166680.

The previous prime is 12281539. The next prime is 12281573. The reversal of 12281567 is 76518221.

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 12281567 - 2²² = 8087263 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 (12281597) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 57284 + ... + 57497.

It is an arithmetic number, because the mean of its divisors is an integer number (3099114).

Almost surely, 2^12281567 is an apocalyptic number.

12281567 is a deficient number, since it is larger than the sum of its proper divisors (114889).

12281567 is a wasteful number, since it uses less digits than its factorization.

12281567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114888.

The product of its digits is 6720, while the sum is 32.

The square root of 12281567 is about 3504.5066699894. The cubic root of 12281567 is about 230.7196551597.

Adding to 12281567 its reverse (76518221), we get a palindrome (88799788).

The spelling of 12281567 in words is "twelve million, two hundred eighty-one thousand, five hundred sixty-seven".