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13206125 = 53105649
BaseRepresentation
bin110010011000…
…001001101101
3220211221101202
4302120021231
511340044000
61151015245
7220151552
oct62301155
926757352
1013206125
1174aaa59
12450a525
132974c9a
141a7aa29
15125cdd5
hexc9826d

13206125 has 8 divisors (see below), whose sum is σ = 16481400. Its totient is φ = 10564800.

The previous prime is 13206043. The next prime is 13206131. The reversal of 13206125 is 52160231.

It can be written as a sum of positive squares in 4 ways, for example, as 169 + 13205956 = 13^2 + 3634^2 .

It is not a de Polignac number, because 13206125 - 28 = 13205869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13206097 and 13206106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52700 + ... + 52949.

It is an arithmetic number, because the mean of its divisors is an integer number (2060175).

Almost surely, 213206125 is an apocalyptic number.

It is an amenable number.

13206125 is a deficient number, since it is larger than the sum of its proper divisors (3275275).

13206125 is an equidigital number, since it uses as much as digits as its factorization.

13206125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105664 (or 105654 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 13206125 is about 3634.0232525398. The cubic root of 13206125 is about 236.3696984952.

Adding to 13206125 its reverse (52160231), we get a palindrome (65366356).

It can be divided in two parts, 13206 and 125, that added together give a palindrome (13331).

The spelling of 13206125 in words is "thirteen million, two hundred six thousand, one hundred twenty-five".

Divisors: 1 5 25 125 105649 528245 2641225 13206125