12771225 has 36 divisors (see below), whose sum is σ = 23625472. Its totient is φ = 6588000.

The previous prime is 12771221. The next prime is 12771271. The reversal of 12771225 is 52217721.

It is not a de Polignac number, because 12771225 - 2² = 12771221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12771221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6060 + ... + 7890.

Almost surely, 2^12771225 is an apocalyptic number.

12771225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12771225 is a deficient number, since it is larger than the sum of its proper divisors (10854247).

12771225 is a wasteful number, since it uses less digits than its factorization.

12771225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 1870 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 12771225 is about 3573.6850728625. The cubic root of 12771225 is about 233.7459987686.

Adding to 12771225 its reverse (52217721), we get a palindrome (64988946).

It can be divided in two parts, 12771 and 225, that added together give a square (12996 = 114²).

The spelling of 12771225 in words is "twelve million, seven hundred seventy-one thousand, two hundred twenty-five".