12781970 has 8 divisors (see below), whose sum is σ = 23007564. Its totient is φ = 5112784.

The previous prime is 12781939. The next prime is 12782009. The reversal of 12781970 is 7918721.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 29929 = 3571^2 + 173^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12781970.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639089 + ... + 639108.

Almost surely, 2^12781970 is an apocalyptic number.

12781970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12781970 is a deficient number, since it is larger than the sum of its proper divisors (10225594).

12781970 is a wasteful number, since it uses less digits than its factorization.

12781970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278204.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 12781970 is about 3575.1881069393. The cubic root of 12781970 is about 233.8115340301.

The spelling of 12781970 in words is "twelve million, seven hundred eighty-one thousand, nine hundred seventy".