12978351 has 12 divisors (see below), whose sum is σ = 18923112. Its totient is φ = 8570736.

The previous prime is 12978337. The next prime is 12978373. The reversal of 12978351 is 15387921.

It is not a de Polignac number, because 12978351 - 2¹³ = 12970159 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5776 + ... + 7701.

It is an arithmetic number, because the mean of its divisors is an integer number (1576926).

Almost surely, 2^12978351 is an apocalyptic number.

12978351 is the 1926-th nonagonal number.

12978351 is a deficient number, since it is larger than the sum of its proper divisors (5944761).

12978351 is a wasteful number, since it uses less digits than its factorization.

12978351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13590 (or 13587 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12978351 is about 3602.5478483984. The cubic root of 12978351 is about 235.0028730598.

The spelling of 12978351 in words is "twelve million, nine hundred seventy-eight thousand, three hundred fifty-one".