12774215 has 4 divisors (see below), whose sum is σ = 15329064. Its totient is φ = 10219368.

The previous prime is 12774211. The next prime is 12774227. The reversal of 12774215 is 51247721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51247721 = 7 ⋅7321103.

It is a cyclic number.

It is not a de Polignac number, because 12774215 - 2² = 12774211 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 (12774211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277417 + ... + 1277426.

It is an arithmetic number, because the mean of its divisors is an integer number (3832266).

Almost surely, 2^12774215 is an apocalyptic number.

12774215 is a deficient number, since it is larger than the sum of its proper divisors (2554849).

12774215 is an equidigital number, since it uses as much as digits as its factorization.

12774215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554848.

The product of its digits is 3920, while the sum is 29.

The square root of 12774215 is about 3574.1033840671. The cubic root of 12774215 is about 233.7642388878.

The spelling of 12774215 in words is "twelve million, seven hundred seventy-four thousand, two hundred fifteen".