12817472 has 14 divisors (see below), whose sum is σ = 25434798. Its totient is φ = 6408704.

The previous prime is 12817471. The next prime is 12817481. The reversal of 12817472 is 27471821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9634816 + 3182656 = 3104^2 + 1784^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (12817471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100073 + ... + 100200.

Almost surely, 2^12817472 is an apocalyptic number.

It is an amenable number.

12817472 is a deficient number, since it is larger than the sum of its proper divisors (12617326).

12817472 is an equidigital number, since it uses as much as digits as its factorization.

12817472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200285 (or 200275 counting only the distinct ones).

The product of its digits is 6272, while the sum is 32.

The square root of 12817472 is about 3580.1497175398. The cubic root of 12817472 is about 234.0278049118.

The spelling of 12817472 in words is "twelve million, eight hundred seventeen thousand, four hundred seventy-two".