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13282985 = 515716921
BaseRepresentation
bin110010101010…
…111010101001
3220222211211102
4302222322221
511400023420
61152411145
7220621622
oct62527251
926884742
1013282985
117552781
124546ab5
1329a0c71
141a9aa49
151275a75
hexcaaea9

13282985 has 8 divisors (see below), whose sum is σ = 16042056. Its totient is φ = 10558080.

The previous prime is 13282961. The next prime is 13282987. The reversal of 13282985 is 58928231.

It can be written as a sum of positive squares in 4 ways, for example, as 1373584 + 11909401 = 1172^2 + 3451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13282985 - 26 = 13282921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13282987) 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 7 ways as a sum of consecutive naturals, for example, 7676 + ... + 9245.

It is an arithmetic number, because the mean of its divisors is an integer number (2005257).

Almost surely, 213282985 is an apocalyptic number.

It is an amenable number.

13282985 is a deficient number, since it is larger than the sum of its proper divisors (2759071).

13282985 is a wasteful number, since it uses less digits than its factorization.

13282985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17083.

The product of its digits is 34560, while the sum is 38.

The square root of 13282985 is about 3644.5829665409. The cubic root of 13282985 is about 236.8273710695.

The spelling of 13282985 in words is "thirteen million, two hundred eighty-two thousand, nine hundred eighty-five".

Divisors: 1 5 157 785 16921 84605 2656597 13282985