12478724 has 6 divisors (see below), whose sum is σ = 21837774. Its totient is φ = 6239360.

The previous prime is 12478723. The next prime is 12478727. The reversal of 12478724 is 42787421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12376324 + 102400 = 3518^2 + 320^2 .

It is not an unprimeable number, because it can be changed into a prime (12478721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1559837 + ... + 1559844.

It is an arithmetic number, because the mean of its divisors is an integer number (3639629).

Almost surely, 2^12478724 is an apocalyptic number.

It is an amenable number.

12478724 is a deficient number, since it is larger than the sum of its proper divisors (9359050).

12478724 is a wasteful number, since it uses less digits than its factorization.

12478724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119685 (or 3119683 counting only the distinct ones).

The product of its digits is 25088, while the sum is 35.

The square root of 12478724 is about 3532.5237437277. The cubic root of 12478724 is about 231.9476943121.

The spelling of 12478724 in words is "twelve million, four hundred seventy-eight thousand, seven hundred twenty-four".