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13217041 = 17777473
BaseRepresentation
bin110010011010…
…110100010001
3220212111101001
4302122310101
511340421131
61151142001
7220225435
oct62326421
926774331
1013217041
117508182
124514901
132979c46
141a809c5
151261261
hexc9ad11

13217041 has 4 divisors (see below), whose sum is σ = 13994532. Its totient is φ = 12439552.

The previous prime is 13217033. The next prime is 13217089. The reversal of 13217041 is 14071231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8288641 + 4928400 = 2879^2 + 2220^2 .

It is a cyclic number.

It is not a de Polignac number, because 13217041 - 23 = 13217033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13217021) 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, 388720 + ... + 388753.

It is an arithmetic number, because the mean of its divisors is an integer number (3498633).

Almost surely, 213217041 is an apocalyptic number.

It is an amenable number.

13217041 is a deficient number, since it is larger than the sum of its proper divisors (777491).

13217041 is an equidigital number, since it uses as much as digits as its factorization.

13217041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777490.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 13217041 is about 3635.5248589440. The cubic root of 13217041 is about 236.4348071988.

Adding to 13217041 its reverse (14071231), we get a palindrome (27288272).

The spelling of 13217041 in words is "thirteen million, two hundred seventeen thousand, forty-one".

Divisors: 1 17 777473 13217041