12613281 has 8 divisors (see below), whose sum is σ = 17228064. Its totient is φ = 8203680.

The previous prime is 12613243. The next prime is 12613291. The reversal of 12613281 is 18231621.

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

It is not a de Polignac number, because 12613281 - 2¹⁴ = 12596897 is a prime.

It is a super-2 number, since 2×12613281² = 318189715169922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12613241) 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, 51151 + ... + 51396.

It is an arithmetic number, because the mean of its divisors is an integer number (2153508).

Almost surely, 2^12613281 is an apocalyptic number.

It is an amenable number.

12613281 is a deficient number, since it is larger than the sum of its proper divisors (4614783).

12613281 is a wasteful number, since it uses less digits than its factorization.

12613281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102591.

The product of its digits is 576, while the sum is 24.

The square root of 12613281 is about 3551.5181260976. The cubic root of 12613281 is about 232.7784062292.

The spelling of 12613281 in words is "twelve million, six hundred thirteen thousand, two hundred eighty-one".