12538478 has 8 divisors (see below), whose sum is σ = 19034568. Its totient is φ = 6193624.

The previous prime is 12538453. The next prime is 12538481. The reversal of 12538478 is 87483521.

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

It is a Curzon number.

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, 37601 + ... + 37932.

It is an arithmetic number, because the mean of its divisors is an integer number (2379321).

Almost surely, 2^12538478 is an apocalyptic number.

12538478 is a deficient number, since it is larger than the sum of its proper divisors (6496090).

12538478 is an equidigital number, since it uses as much as digits as its factorization.

12538478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75618.

The product of its digits is 53760, while the sum is 38.

The square root of 12538478 is about 3540.9713356648. The cubic root of 12538478 is about 232.3173298286.

The spelling of 12538478 in words is "twelve million, five hundred thirty-eight thousand, four hundred seventy-eight".