12704671225 has 9 divisors (see below), whose sum is σ = 15754491183. Its totient is φ = 10163286120.

The previous prime is 12704671223. The next prime is 12704671297. The reversal of 12704671225 is 52217640721.

The square root of 12704671225 is 112715.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4573681641 + 8130989584 = 67629^2 + 90172^2 .

It is not a de Polignac number, because 12704671225 - 2¹ = 12704671223 is a prime.

It is a super-2 number, since 2×12704671225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12704671223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 552304 + ... + 574846.

Almost surely, 2^12704671225 is an apocalyptic number.

12704671225 is the 112715-th square number.

12704671225 is the 56358-th centered octagonal number.

It is an amenable number.

12704671225 is a deficient number, since it is larger than the sum of its proper divisors (3049819958).

12704671225 is an frugal number, since it uses more digits than its factorization.

12704671225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45096 (or 22548 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

It can be divided in two parts, 12704 and 671225, that added together give a square (683929 = 827²).

The spelling of 12704671225 in words is "twelve billion, seven hundred four million, six hundred seventy-one thousand, two hundred twenty-five".