12766015 has 4 divisors (see below), whose sum is σ = 15319224. Its totient is φ = 10212808.

The previous prime is 12766009. The next prime is 12766027. The reversal of 12766015 is 51066721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51066721 = 433 ⋅117937.

It is a cyclic number.

It is not a de Polignac number, because 12766015 - 2¹¹ = 12763967 is a prime.

It is a super-2 number, since 2×12766015² = 325942277960450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276597 + ... + 1276606.

It is an arithmetic number, because the mean of its divisors is an integer number (3829806).

Almost surely, 2^12766015 is an apocalyptic number.

12766015 is a deficient number, since it is larger than the sum of its proper divisors (2553209).

12766015 is an equidigital number, since it uses as much as digits as its factorization.

12766015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553208.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12766015 is about 3572.9560590637. The cubic root of 12766015 is about 233.7142090148.

The spelling of 12766015 in words is "twelve million, seven hundred sixty-six thousand, fifteen".