12681215 has 4 divisors (see below), whose sum is σ = 15217464. Its totient is φ = 10144968.

The previous prime is 12681209. The next prime is 12681217. The reversal of 12681215 is 51218621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51218621 = 197 ⋅259993.

It is a cyclic number.

It is not a de Polignac number, because 12681215 - 2⁸ = 12680959 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 (12681217) 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, 1268117 + ... + 1268126.

It is an arithmetic number, because the mean of its divisors is an integer number (3804366).

Almost surely, 2^12681215 is an apocalyptic number.

12681215 is a deficient number, since it is larger than the sum of its proper divisors (2536249).

12681215 is an equidigital number, since it uses as much as digits as its factorization.

12681215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536248.

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

The square root of 12681215 is about 3561.0693618631. The cubic root of 12681215 is about 233.1955660662.

Adding to 12681215 its reverse (51218621), we get a palindrome (63899836).

The spelling of 12681215 in words is "twelve million, six hundred eighty-one thousand, two hundred fifteen".