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12580285 = 52516057
BaseRepresentation
bin101111111111…
…010110111101
3212200010220111
4233333112331
511210032120
61125350021
7211634134
oct57772675
925603814
1012580285
117112833
124268311
1327b6173
14195691b
15118775a
hexbff5bd

12580285 has 4 divisors (see below), whose sum is σ = 15096348. Its totient is φ = 10064224.

The previous prime is 12580283. The next prime is 12580297. The reversal of 12580285 is 58208521.

12580285 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7322436 + 5257849 = 2706^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 12580285 - 21 = 12580283 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12580283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258024 + ... + 1258033.

It is an arithmetic number, because the mean of its divisors is an integer number (3774087).

Almost surely, 212580285 is an apocalyptic number.

It is an amenable number.

12580285 is a deficient number, since it is larger than the sum of its proper divisors (2516063).

12580285 is an equidigital number, since it uses as much as digits as its factorization.

12580285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516062.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 12580285 is about 3546.8697466921. The cubic root of 12580285 is about 232.5752483146.

The spelling of 12580285 in words is "twelve million, five hundred eighty thousand, two hundred eighty-five".

Divisors: 1 5 2516057 12580285