12777225 has 12 divisors (see below), whose sum is σ = 21125136. Its totient is φ = 6814480.

The previous prime is 12777221. The next prime is 12777277. The reversal of 12777225 is 52277721.

12777225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12777225 - 2² = 12777221 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12777221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85107 + ... + 85256.

It is an arithmetic number, because the mean of its divisors is an integer number (1760428).

Almost surely, 2^12777225 is an apocalyptic number.

12777225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12777225 is a deficient number, since it is larger than the sum of its proper divisors (8347911).

12777225 is a wasteful number, since it uses less digits than its factorization.

12777225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170376 (or 170371 counting only the distinct ones).

The product of its digits is 13720, while the sum is 33.

The square root of 12777225 is about 3574.5244438946. The cubic root of 12777225 is about 233.7825981399.

The spelling of 12777225 in words is "twelve million, seven hundred seventy-seven thousand, two hundred twenty-five".