12931378 has 8 divisors (see below), whose sum is σ = 19578672. Its totient is φ = 6405156.

The previous prime is 12931363. The next prime is 12931379. The reversal of 12931378 is 87313921.

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

It is not an unprimeable number, because it can be changed into a prime (12931379) 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, 30000 + ... + 30427.

It is an arithmetic number, because the mean of its divisors is an integer number (2447334).

Almost surely, 2^12931378 is an apocalyptic number.

12931378 is a deficient number, since it is larger than the sum of its proper divisors (6647294).

12931378 is a wasteful number, since it uses less digits than its factorization.

12931378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60536.

The product of its digits is 9072, while the sum is 34.

The square root of 12931378 is about 3596.0225249573. The cubic root of 12931378 is about 234.7190122803.

The spelling of 12931378 in words is "twelve million, nine hundred thirty-one thousand, three hundred seventy-eight".