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13205041 = 37356893
BaseRepresentation
bin110010010111…
…111000110001
3220211212220121
4302113320301
511340030131
61151010241
7220145443
oct62277061
926755817
1013205041
1174aa163
124509981
132974645
141a7a493
15125c911
hexc97e31

13205041 has 4 divisors (see below), whose sum is σ = 13561972. Its totient is φ = 12848112.

The previous prime is 13205029. The next prime is 13205069. The reversal of 13205041 is 14050231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14050231 = 131080787.

It can be written as a sum of positive squares in 2 ways, for example, as 12673600 + 531441 = 3560^2 + 729^2 .

It is a cyclic number.

It is not a de Polignac number, because 13205041 - 219 = 12680753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13205081) 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, 178410 + ... + 178483.

It is an arithmetic number, because the mean of its divisors is an integer number (3390493).

Almost surely, 213205041 is an apocalyptic number.

It is an amenable number.

13205041 is a deficient number, since it is larger than the sum of its proper divisors (356931).

13205041 is an equidigital number, since it uses as much as digits as its factorization.

13205041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356930.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13205041 is about 3633.8741034879. The cubic root of 13205041 is about 236.3632309972.

Adding to 13205041 its reverse (14050231), we get a palindrome (27255272).

The spelling of 13205041 in words is "thirteen million, two hundred five thousand, forty-one".

Divisors: 1 37 356893 13205041