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12891253 = 1719107373
BaseRepresentation
bin110001001011…
…010001110101
3220020221110211
4301023101311
511300010003
61140145421
7214400554
oct61132165
926227424
1012891253
117305431
124398271
13289487b
1419d7d9b
1511e996d
hexc4b475

12891253 has 16 divisors (see below), whose sum is σ = 14541120. Its totient is φ = 11356416.

The previous prime is 12891251. The next prime is 12891259. The reversal of 12891253 is 35219821.

12891253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12891253 - 21 = 12891251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891251) 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, 34375 + ... + 34747.

It is an arithmetic number, because the mean of its divisors is an integer number (908820).

Almost surely, 212891253 is an apocalyptic number.

It is an amenable number.

12891253 is a deficient number, since it is larger than the sum of its proper divisors (1649867).

12891253 is a wasteful number, since it uses less digits than its factorization.

12891253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its digits is 4320, while the sum is 31.

The square root of 12891253 is about 3590.4391096355. The cubic root of 12891253 is about 234.4759894978.

The spelling of 12891253 in words is "twelve million, eight hundred ninety-one thousand, two hundred fifty-three".

Divisors: 1 17 19 107 323 373 1819 2033 6341 7087 34561 39911 120479 678487 758309 12891253