12780104 has 8 divisors (see below), whose sum is σ = 23962710. Its totient is φ = 6390048.

The previous prime is 12780017. The next prime is 12780113. The reversal of 12780104 is 40108721.

It can be written as a sum of positive squares in only one way, i.e., 10903204 + 1876900 = 3302^2 + 1370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12780104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798749 + ... + 798764.

Almost surely, 2^12780104 is an apocalyptic number.

It is an amenable number.

12780104 is a deficient number, since it is larger than the sum of its proper divisors (11182606).

12780104 is a wasteful number, since it uses less digits than its factorization.

12780104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597519 (or 1597515 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12780104 is about 3574.9271321245. The cubic root of 12780104 is about 233.8001556705.

Adding to 12780104 its reverse (40108721), we get a palindrome (52888825).

The spelling of 12780104 in words is "twelve million, seven hundred eighty thousand, one hundred four".