12947290 has 8 divisors (see below), whose sum is σ = 23305140. Its totient is φ = 5178912.

The previous prime is 12947261. The next prime is 12947293. The reversal of 12947290 is 9274921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12510369 + 436921 = 3537^2 + 661^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (12947293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647355 + ... + 647374.

Almost surely, 2^12947290 is an apocalyptic number.

12947290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12947290 is a deficient number, since it is larger than the sum of its proper divisors (10357850).

12947290 is a wasteful number, since it uses less digits than its factorization.

12947290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294736.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 12947290 is about 3598.2342892035. The cubic root of 12947290 is about 234.8152463673.

The spelling of 12947290 in words is "twelve million, nine hundred forty-seven thousand, two hundred ninety".