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13143001 = 41320561
BaseRepresentation
bin110010001000…
…101111011001
3220201201210211
4302020233121
511331034001
61145411121
7216466534
oct62105731
926651724
1013143001
117467593
124499aa1
132952331
141a61a1b
151249351
hexc88bd9

13143001 has 4 divisors (see below), whose sum is σ = 13463604. Its totient is φ = 12822400.

The previous prime is 13142981. The next prime is 13143037. The reversal of 13143001 is 10034131.

13143001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10034131 = 17590243.

It can be written as a sum of positive squares in 2 ways, for example, as 2253001 + 10890000 = 1501^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 13143001 - 27 = 13142873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13143301) 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, 160240 + ... + 160321.

It is an arithmetic number, because the mean of its divisors is an integer number (3365901).

Almost surely, 213143001 is an apocalyptic number.

It is an amenable number.

13143001 is a deficient number, since it is larger than the sum of its proper divisors (320603).

13143001 is an equidigital number, since it uses as much as digits as its factorization.

13143001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320602.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 13143001 is about 3625.3277093250. The cubic root of 13143001 is about 235.9924887488.

Adding to 13143001 its reverse (10034131), we get a palindrome (23177132).

The spelling of 13143001 in words is "thirteen million, one hundred forty-three thousand, one".

Divisors: 1 41 320561 13143001