12788247 has 4 divisors (see below), whose sum is σ = 17051000. Its totient is φ = 8525496.

The previous prime is 12788239. The next prime is 12788249. The reversal of 12788247 is 74288721.

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

It is not a de Polignac number, because 12788247 - 2³ = 12788239 is a prime.

It is a super-2 number, since 2×12788247² = 327078522666018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 2131372 + ... + 2131377.

It is an arithmetic number, because the mean of its divisors is an integer number (4262750).

Almost surely, 2^12788247 is an apocalyptic number.

12788247 is a deficient number, since it is larger than the sum of its proper divisors (4262753).

12788247 is an equidigital number, since it uses as much as digits as its factorization.

12788247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262752.

The product of its digits is 50176, while the sum is 39.

The square root of 12788247 is about 3576.0658550983. The cubic root of 12788247 is about 233.8498013400.

The spelling of 12788247 in words is "twelve million, seven hundred eighty-eight thousand, two hundred forty-seven".