12780787 has 8 divisors (see below), whose sum is σ = 14245200. Its totient is φ = 11395584.

The previous prime is 12780763. The next prime is 12780797. The reversal of 12780787 is 78708721.

It is a happy number.

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 12780787 - 2¹⁵ = 12748019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12780707) 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, 19462 + ... + 20107.

It is an arithmetic number, because the mean of its divisors is an integer number (1780650).

Almost surely, 2^12780787 is an apocalyptic number.

12780787 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12780787 is a deficient number, since it is larger than the sum of its proper divisors (1464413).

12780787 is a wasteful number, since it uses less digits than its factorization.

12780787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39605.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 12780787 is about 3575.0226572709. The cubic root of 12780787 is about 233.8043205469.

The spelling of 12780787 in words is "twelve million, seven hundred eighty thousand, seven hundred eighty-seven".