12961478 has 4 divisors (see below), whose sum is σ = 19442220. Its totient is φ = 6480738.

The previous prime is 12961471. The next prime is 12961483. The reversal of 12961478 is 87416921.

12961478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3240368 + ... + 3240371.

It is an arithmetic number, because the mean of its divisors is an integer number (4860555).

Almost surely, 2^12961478 is an apocalyptic number.

12961478 is a deficient number, since it is larger than the sum of its proper divisors (6480742).

12961478 is an equidigital number, since it uses as much as digits as its factorization.

12961478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480741.

The product of its digits is 24192, while the sum is 38.

The square root of 12961478 is about 3600.2052719255. The cubic root of 12961478 is about 234.9009874122.

The spelling of 12961478 in words is "twelve million, nine hundred sixty-one thousand, four hundred seventy-eight".