12950781 has 8 divisors (see below), whose sum is σ = 17285184. Its totient is φ = 8625120.

The previous prime is 12950779. The next prime is 12950789. The reversal of 12950781 is 18705921.

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

It is not a de Polignac number, because 12950781 - 2¹ = 12950779 is a prime.

It is a super-2 number, since 2×12950781² = 335445457019922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12950789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3105 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (2160648).

Almost surely, 2^12950781 is an apocalyptic number.

It is an amenable number.

12950781 is a deficient number, since it is larger than the sum of its proper divisors (4334403).

12950781 is a wasteful number, since it uses less digits than its factorization.

12950781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 12950781 is about 3598.7193555486. The cubic root of 12950781 is about 234.8363490166.

It can be divided in two parts, 12950 and 781, that added together give a palindrome (13731).

The spelling of 12950781 in words is "twelve million, nine hundred fifty thousand, seven hundred eighty-one".