12912938 has 4 divisors (see below), whose sum is σ = 19369410. Its totient is φ = 6456468.

The previous prime is 12912929. The next prime is 12912947. The reversal of 12912938 is 83921921.

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

It is an interprime number because it is at equal distance from previous prime (12912929) and next prime (12912947).

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 683929 = 3497^2 + 827^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12912898 and 12912907.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228233 + ... + 3228236.

Almost surely, 2^12912938 is an apocalyptic number.

12912938 is a deficient number, since it is larger than the sum of its proper divisors (6456472).

12912938 is an equidigital number, since it uses as much as digits as its factorization.

12912938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456471.

The product of its digits is 7776, while the sum is 35.

The square root of 12912938 is about 3593.4576663709. The cubic root of 12912938 is about 234.6073903133.

The spelling of 12912938 in words is "twelve million, nine hundred twelve thousand, nine hundred thirty-eight".