12749225 has 12 divisors (see below), whose sum is σ = 15952476. Its totient is φ = 10106880.

The previous prime is 12749197. The next prime is 12749239. The reversal of 12749225 is 52294721.

It can be written as a sum of positive squares in 6 ways, for example, as 7198489 + 5550736 = 2683^2 + 2356^2 .

It is not a de Polignac number, because 12749225 - 2¹⁶ = 12683689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12749191 and 12749200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569 + ... + 5081.

It is an arithmetic number, because the mean of its divisors is an integer number (1329373).

Almost surely, 2^12749225 is an apocalyptic number.

It is an amenable number.

12749225 is a deficient number, since it is larger than the sum of its proper divisors (3203251).

12749225 is a wasteful number, since it uses less digits than its factorization.

12749225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4631 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 12749225 is about 3570.6056909158. The cubic root of 12749225 is about 233.6117029169.

The spelling of 12749225 in words is "twelve million, seven hundred forty-nine thousand, two hundred twenty-five".