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13127201 = 42131181
BaseRepresentation
bin110010000100…
…111000100001
3220200221010122
4302010320201
511330032301
61145210025
7216402503
oct62047041
926627118
1013127201
11745672a
124490915
132948099
141a59d73
15124481b
hexc84e21

13127201 has 4 divisors (see below), whose sum is σ = 13158804. Its totient is φ = 13095600.

The previous prime is 13127173. The next prime is 13127207. The reversal of 13127201 is 10272131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10272131 = 17604243.

It can be written as a sum of positive squares in 2 ways, for example, as 160000 + 12967201 = 400^2 + 3601^2 .

It is a cyclic number.

It is not a de Polignac number, because 13127201 - 210 = 13126177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13127201.

It is not an unprimeable number, because it can be changed into a prime (13127207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15170 + ... + 16011.

It is an arithmetic number, because the mean of its divisors is an integer number (3289701).

Almost surely, 213127201 is an apocalyptic number.

It is an amenable number.

13127201 is a deficient number, since it is larger than the sum of its proper divisors (31603).

13127201 is an equidigital number, since it uses as much as digits as its factorization.

13127201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31602.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 13127201 is about 3623.1479406726. The cubic root of 13127201 is about 235.8978838591.

Adding to 13127201 its reverse (10272131), we get a palindrome (23399332).

The spelling of 13127201 in words is "thirteen million, one hundred twenty-seven thousand, two hundred one".

Divisors: 1 421 31181 13127201