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12785341 = 61320857
BaseRepresentation
bin110000110001…
…011010111101
3220001120012011
4300301122331
511233112331
61134011221
7213450022
oct60613275
926046164
1012785341
1172428a8
124346b11
1328585ba
1419ab549
1511c83b1
hexc316bd

12785341 has 4 divisors (see below), whose sum is σ = 12806812. Its totient is φ = 12763872.

The previous prime is 12785327. The next prime is 12785351. The reversal of 12785341 is 14358721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14358721 = 131104517.

It can be written as a sum of positive squares in 2 ways, for example, as 5784025 + 7001316 = 2405^2 + 2646^2 .

It is a cyclic number.

It is not a de Polignac number, because 12785341 - 29 = 12784829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9816 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (3201703).

Almost surely, 212785341 is an apocalyptic number.

It is an amenable number.

12785341 is a deficient number, since it is larger than the sum of its proper divisors (21471).

12785341 is an equidigital number, since it uses as much as digits as its factorization.

12785341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21470.

The product of its digits is 6720, while the sum is 31.

The square root of 12785341 is about 3575.6595195852. The cubic root of 12785341 is about 233.8320866628.

The spelling of 12785341 in words is "twelve million, seven hundred eighty-five thousand, three hundred forty-one".

Divisors: 1 613 20857 12785341