12780859 has 8 divisors (see below), whose sum is σ = 15730400. Its totient is φ = 10112256.

The previous prime is 12780827. The next prime is 12780869. The reversal of 12780859 is 95808721.

12780859 = 1457² + 1458² + ... + 1462².

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

It is not a de Polignac number, because 12780859 - 2⁵ = 12780827 is a prime.

It is a super-3 number, since 3×12780859³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12780809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70134 + ... + 70315.

It is an arithmetic number, because the mean of its divisors is an integer number (1966300).

Almost surely, 2^12780859 is an apocalyptic number.

12780859 is a deficient number, since it is larger than the sum of its proper divisors (2949541).

12780859 is a wasteful number, since it uses less digits than its factorization.

12780859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140469.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 12780859 is about 3575.0327271229. The cubic root of 12780859 is about 233.8047595882.

The spelling of 12780859 in words is "twelve million, seven hundred eighty thousand, eight hundred fifty-nine".