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13201297 = 42131357
BaseRepresentation
bin110010010110…
…111110010001
3220211200202221
4302112332101
511334420142
61150541041
7220131514
oct62267621
926750687
1013201297
1174a736a
124507781
132972a25
141a78d7b
15125b767
hexc96f91

13201297 has 4 divisors (see below), whose sum is σ = 13233076. Its totient is φ = 13169520.

The previous prime is 13201291. The next prime is 13201327. The reversal of 13201297 is 79210231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79210231 = 173345707.

It can be written as a sum of positive squares in 2 ways, for example, as 3690241 + 9511056 = 1921^2 + 3084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13201297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13201291) 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, 15258 + ... + 16099.

It is an arithmetic number, because the mean of its divisors is an integer number (3308269).

Almost surely, 213201297 is an apocalyptic number.

It is an amenable number.

13201297 is a deficient number, since it is larger than the sum of its proper divisors (31779).

13201297 is an equidigital number, since it uses as much as digits as its factorization.

13201297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31778.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13201297 is about 3633.3589142830. The cubic root of 13201297 is about 236.3408903475.

The spelling of 13201297 in words is "thirteen million, two hundred one thousand, two hundred ninety-seven".

Divisors: 1 421 31357 13201297