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75305 = 515061
BaseRepresentation
bin10010011000101001
310211022002
4102120221
54402210
61340345
7432356
oct223051
9124262
1075305
115163a
12376b5
1328379
141d62d
15174a5
hex12629

75305 has 4 divisors (see below), whose sum is σ = 90372. Its totient is φ = 60240.

The previous prime is 75289. The next prime is 75307. The reversal of 75305 is 50357.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50357 = 371361.

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 32041 = 208^2 + 179^2 .

It is not a de Polignac number, because 75305 - 24 = 75289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 75305.

It is not an unprimeable number, because it can be changed into a prime (75307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7526 + ... + 7535.

It is an arithmetic number, because the mean of its divisors is an integer number (22593).

275305 is an apocalyptic number.

It is an amenable number.

75305 is a deficient number, since it is larger than the sum of its proper divisors (15067).

75305 is a wasteful number, since it uses less digits than its factorization.

75305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15066.

The product of its (nonzero) digits is 525, while the sum is 20.

The square root of 75305 is about 274.4175650355. The cubic root of 75305 is about 42.2287219398.

The spelling of 75305 in words is "seventy-five thousand, three hundred five".

Divisors: 1 5 15061 75305