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12805053 = 389199241
BaseRepresentation
bin110000110110…
…001110111101
3220002120020020
4300312032331
511234230203
61134242353
7213561342
oct60661675
926076206
1012805053
117256698
1243563b9
132864571
1419b47c9
1511ce153
hexc363bd

12805053 has 16 divisors (see below), whose sum is σ = 17424000. Its totient is φ = 8363520.

The previous prime is 12805049. The next prime is 12805061. The reversal of 12805053 is 35050821.

It is not a de Polignac number, because 12805053 - 22 = 12805049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53013 + ... + 53253.

It is an arithmetic number, because the mean of its divisors is an integer number (1089000).

Almost surely, 212805053 is an apocalyptic number.

It is an amenable number.

12805053 is a deficient number, since it is larger than the sum of its proper divisors (4618947).

12805053 is a wasteful number, since it uses less digits than its factorization.

12805053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12805053 is about 3578.4148725378. The cubic root of 12805053 is about 233.9521963858.

Adding to 12805053 its reverse (35050821), we get a palindrome (47855874).

The spelling of 12805053 in words is "twelve million, eight hundred five thousand, fifty-three".

Divisors: 1 3 89 199 241 267 597 723 17711 21449 47959 53133 64347 143877 4268351 12805053