12785570 has 48 divisors (see below), whose sum is σ = 27147960. Its totient is φ = 4322304.

The previous prime is 12785527. The next prime is 12785579. The reversal of 12785570 is 7558721.

It can be written as a sum of positive squares in 4 ways, for example, as 6817321 + 5968249 = 2611^2 + 2443^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 12785570.

It is not an unprimeable number, because it can be changed into a prime (12785579) 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 23 ways as a sum of consecutive naturals, for example, 47396 + ... + 47664.

Almost surely, 2^12785570 is an apocalyptic number.

12785570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12785570 is an abundant number, since it is smaller than the sum of its proper divisors (14362390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12785570 is a wasteful number, since it uses less digits than its factorization.

12785570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 12785570 is about 3575.6915415063. The cubic root of 12785570 is about 233.8334827207.

The spelling of 12785570 in words is "twelve million, seven hundred eighty-five thousand, five hundred seventy".