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13124605 = 513238779
BaseRepresentation
bin110010000100…
…001111111101
3220200210120111
4302010033331
511324441410
61145150021
7216362104
oct62041775
926623514
1013124605
11745478a
12448b311
132946b50
141a5903b
151243b8a
hexc843fd

13124605 has 16 divisors (see below), whose sum is σ = 17700480. Its totient is φ = 9269568.

The previous prime is 13124593. The next prime is 13124621. The reversal of 13124605 is 50642131.

13124605 is digitally balanced in base 3, 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 13124605 - 213 = 13116413 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2895 + ... + 5884.

It is an arithmetic number, because the mean of its divisors is an integer number (1106280).

Almost surely, 213124605 is an apocalyptic number.

It is an amenable number.

13124605 is a deficient number, since it is larger than the sum of its proper divisors (4575875).

13124605 is a wasteful number, since it uses less digits than its factorization.

13124605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13124605 is about 3622.7896709580. The cubic root of 13124605 is about 235.8823326567.

Adding to 13124605 its reverse (50642131), we get a palindrome (63766736).

The spelling of 13124605 in words is "thirteen million, one hundred twenty-four thousand, six hundred five".

Divisors: 1 5 13 23 65 115 299 1495 8779 43895 114127 201917 570635 1009585 2624921 13124605