12788242 has 4 divisors (see below), whose sum is σ = 19182366. Its totient is φ = 6394120.

The previous prime is 12788239. The next prime is 12788249. The reversal of 12788242 is 24288721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7080921 + 5707321 = 2661^2 + 2389^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12788198 and 12788207.

It is not an unprimeable number, because it can be changed into a prime (12788249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197059 + ... + 3197062.

Almost surely, 2^12788242 is an apocalyptic number.

12788242 is a deficient number, since it is larger than the sum of its proper divisors (6394124).

12788242 is an equidigital number, since it uses as much as digits as its factorization.

12788242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6394123.

The product of its digits is 14336, while the sum is 34.

The square root of 12788242 is about 3576.0651560060. The cubic root of 12788242 is about 233.8497708628.

The spelling of 12788242 in words is "twelve million, seven hundred eighty-eight thousand, two hundred forty-two".