12516281 has 8 divisors (see below), whose sum is σ = 13004544. Its totient is φ = 12033360.

The previous prime is 12516277. The next prime is 12516289. The reversal of 12516281 is 18261521.

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

It is a cyclic number.

It is not a de Polignac number, because 12516281 - 2² = 12516277 is a prime.

It is a super-2 number, since 2×12516281² = 313314580141922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12516281.

It is not an unprimeable number, because it can be changed into a prime (12516289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3815 + ... + 6291.

It is an arithmetic number, because the mean of its divisors is an integer number (1625568).

Almost surely, 2^12516281 is an apocalyptic number.

It is an amenable number.

12516281 is a deficient number, since it is larger than the sum of its proper divisors (488263).

12516281 is a wasteful number, since it uses less digits than its factorization.

12516281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671.

The product of its digits is 960, while the sum is 26.

The square root of 12516281 is about 3537.8356377876. The cubic root of 12516281 is about 232.1801575769.

The spelling of 12516281 in words is "twelve million, five hundred sixteen thousand, two hundred eighty-one".