12785870 has 16 divisors (see below), whose sum is σ = 24368688. Its totient is φ = 4813440.

The previous prime is 12785869. The next prime is 12785933. The reversal of 12785870 is 7858721.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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, 37436 + ... + 37775.

It is an arithmetic number, because the mean of its divisors is an integer number (1523043).

Almost surely, 2^12785870 is an apocalyptic number.

12785870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12785870 is a deficient number, since it is larger than the sum of its proper divisors (11582818).

12785870 is a wasteful number, since it uses less digits than its factorization.

12785870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75235.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 12785870 is about 3575.7334911875. The cubic root of 12785870 is about 233.8353115922.

The spelling of 12785870 in words is "twelve million, seven hundred eighty-five thousand, eight hundred seventy".