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12013505 = 57343243
BaseRepresentation
bin101101110100…
…111111000001
3211121100102122
4231310333001
511033413010
61105254025
7204053540
oct55647701
924540378
1012013505
116865a19
124034315
1326481aa
14184a157
1510c4855
hexb74fc1

12013505 has 8 divisors (see below), whose sum is σ = 16475712. Its totient is φ = 8237808.

The previous prime is 12013501. The next prime is 12013517. The reversal of 12013505 is 50531021.

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

It is a cyclic number.

It is not a de Polignac number, because 12013505 - 22 = 12013501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171587 + ... + 171656.

It is an arithmetic number, because the mean of its divisors is an integer number (2059464).

Almost surely, 212013505 is an apocalyptic number.

It is an amenable number.

12013505 is a deficient number, since it is larger than the sum of its proper divisors (4462207).

12013505 is an equidigital number, since it uses as much as digits as its factorization.

12013505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343255.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 12013505 is about 3466.0503458548. The cubic root of 12013505 is about 229.0287016777.

Adding to 12013505 its reverse (50531021), we get a palindrome (62544526).

The spelling of 12013505 in words is "twelve million, thirteen thousand, five hundred five".

Divisors: 1 5 7 35 343243 1716215 2402701 12013505