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13243061 = 131018697
BaseRepresentation
bin110010100001…
…001010110101
3220220211001202
4302201022311
511342234221
61151502245
7220364336
oct62411265
926824052
1013243061
117525787
124527985
132988a40
141a8a28d
151268d0b
hexca12b5

13243061 has 4 divisors (see below), whose sum is σ = 14261772. Its totient is φ = 12224352.

The previous prime is 13243033. The next prime is 13243063. The reversal of 13243061 is 16034231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16034231 = 73219647.

It can be written as a sum of positive squares in 2 ways, for example, as 5262436 + 7980625 = 2294^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 13243061 - 26 = 13242997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243063) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 509336 + ... + 509361.

It is an arithmetic number, because the mean of its divisors is an integer number (3565443).

Almost surely, 213243061 is an apocalyptic number.

It is an amenable number.

13243061 is a deficient number, since it is larger than the sum of its proper divisors (1018711).

13243061 is a wasteful number, since it uses less digits than its factorization.

13243061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018710.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 13243061 is about 3639.1016748643. The cubic root of 13243061 is about 236.5898595786.

Adding to 13243061 its reverse (16034231), we get a palindrome (29277292).

The spelling of 13243061 in words is "thirteen million, two hundred forty-three thousand, sixty-one".

Divisors: 1 13 1018697 13243061