12931426 has 8 divisors (see below), whose sum is σ = 19921500. Its totient is φ = 6290928.

The previous prime is 12931423. The next prime is 12931427. The reversal of 12931426 is 62413921.

It can be written as a sum of positive squares in 2 ways, for example, as 8708401 + 4223025 = 2951^2 + 2055^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12931394 and 12931403.

It is not an unprimeable number, because it can be changed into a prime (12931423) 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, 87301 + ... + 87448.

Almost surely, 2^12931426 is an apocalyptic number.

12931426 is a deficient number, since it is larger than the sum of its proper divisors (6990074).

12931426 is a wasteful number, since it uses less digits than its factorization.

12931426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174788.

The product of its digits is 2592, while the sum is 28.

The square root of 12931426 is about 3596.0291989916. The cubic root of 12931426 is about 234.7193026979.

The spelling of 12931426 in words is "twelve million, nine hundred thirty-one thousand, four hundred twenty-six".