12748429 has 4 divisors (see below), whose sum is σ = 13188060. Its totient is φ = 12308800.

The previous prime is 12748427. The next prime is 12748447. The reversal of 12748429 is 92484721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92484721 = 7 ⋅13212103.

It can be written as a sum of positive squares in 2 ways, for example, as 5978025 + 6770404 = 2445^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 12748429 - 2¹ = 12748427 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 (12748427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219772 + ... + 219829.

It is an arithmetic number, because the mean of its divisors is an integer number (3297015).

Almost surely, 2^12748429 is an apocalyptic number.

It is an amenable number.

12748429 is a deficient number, since it is larger than the sum of its proper divisors (439631).

12748429 is an equidigital number, since it uses as much as digits as its factorization.

12748429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439630.

The product of its digits is 32256, while the sum is 37.

The square root of 12748429 is about 3570.4942234934. The cubic root of 12748429 is about 233.6068409538.

The spelling of 12748429 in words is "twelve million, seven hundred forty-eight thousand, four hundred twenty-nine".