12507478 has 8 divisors (see below), whose sum is σ = 19864872. Its totient is φ = 5885856.

The previous prime is 12507457. The next prime is 12507503. The reversal of 12507478 is 87470521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 367867 = 12507478 / (1 + 2 + 5 + 0 + 7 + 4 + 7 + 8).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183900 + ... + 183967.

It is an arithmetic number, because the mean of its divisors is an integer number (2483109).

Almost surely, 2^12507478 is an apocalyptic number.

12507478 is a deficient number, since it is larger than the sum of its proper divisors (7357394).

12507478 is a wasteful number, since it uses less digits than its factorization.

12507478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367886.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 12507478 is about 3536.5912967150. The cubic root of 12507478 is about 232.1257121900.

Adding to 12507478 its reverse (87470521), we get a palindrome (99977999).

The spelling of 12507478 in words is "twelve million, five hundred seven thousand, four hundred seventy-eight".