12926978 has 4 divisors (see below), whose sum is σ = 19390470. Its totient is φ = 6463488.

The previous prime is 12926957. The next prime is 12926981. The reversal of 12926978 is 87962921.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 12482089 + 444889 = 3533^2 + 667^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3231743 + ... + 3231746.

Almost surely, 2^12926978 is an apocalyptic number.

12926978 is a deficient number, since it is larger than the sum of its proper divisors (6463492).

12926978 is an equidigital number, since it uses as much as digits as its factorization.

12926978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463491.

The product of its digits is 108864, while the sum is 44.

The square root of 12926978 is about 3595.4106858605. The cubic root of 12926978 is about 234.6923876156.

The spelling of 12926978 in words is "twelve million, nine hundred twenty-six thousand, nine hundred seventy-eight".