12780133 has 8 divisors (see below), whose sum is σ = 13276440. Its totient is φ = 12291840.

The previous prime is 12780127. The next prime is 12780139. The reversal of 12780133 is 33108721.

It is an interprime number because it is at equal distance from previous prime (12780127) and next prime (12780139).

It can be written as a sum of positive squares in 4 ways, for example, as 3157729 + 9622404 = 1777^2 + 3102^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12780133 - 2⁹ = 12779621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12780098 and 12780107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780139) 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, 1353 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (1659555).

Almost surely, 2^12780133 is an apocalyptic number.

It is an amenable number.

12780133 is a deficient number, since it is larger than the sum of its proper divisors (496307).

12780133 is an equidigital number, since it uses as much as digits as its factorization.

12780133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12780133 is about 3574.9311881489. The cubic root of 12780133 is about 233.8003325130.

Adding to 12780133 its reverse (33108721), we get a palindrome (45888854).

The spelling of 12780133 in words is "twelve million, seven hundred eighty thousand, one hundred thirty-three".