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12175013 = 73166781
BaseRepresentation
bin101110011100…
…011010100101
3211220112222102
4232130122211
511104100023
61112541445
7205325444
oct56343245
924815872
1012175013
1169662a4
1240b1885
1326a3866
14188cd5b
151107628
hexb9c6a5

12175013 has 4 divisors (see below), whose sum is σ = 12341868. Its totient is φ = 12008160.

The previous prime is 12175003. The next prime is 12175049. The reversal of 12175013 is 31057121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31057121 = 293105997.

It can be written as a sum of positive squares in 2 ways, for example, as 3869089 + 8305924 = 1967^2 + 2882^2 .

It is a cyclic number.

It is not a de Polignac number, because 12175013 - 24 = 12174997 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 (12175003) 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, 83318 + ... + 83463.

It is an arithmetic number, because the mean of its divisors is an integer number (3085467).

Almost surely, 212175013 is an apocalyptic number.

It is an amenable number.

12175013 is a deficient number, since it is larger than the sum of its proper divisors (166855).

12175013 is an equidigital number, since it uses as much as digits as its factorization.

12175013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166854.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 12175013 is about 3489.2711273273. The cubic root of 12175013 is about 230.0504804131.

The spelling of 12175013 in words is "twelve million, one hundred seventy-five thousand, thirteen".

Divisors: 1 73 166781 12175013