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12000531 = 34918147
BaseRepresentation
bin101101110001…
…110100010011
3211120200122010
4231301310103
511033004111
61105114003
7204000654
oct55616423
924520563
1012000531
1168571a4
124028903
13264230a
14184552b
1510c0aa6
hexb71d13

12000531 has 8 divisors (see below), whose sum is σ = 16035264. Its totient is φ = 7983080.

The previous prime is 12000523. The next prime is 12000551. The reversal of 12000531 is 13500021.

12000531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12000531 - 23 = 12000523 is a prime.

It is a super-2 number, since 2×120005312 = 288025488563922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12000511) 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, 2601 + ... + 5546.

It is an arithmetic number, because the mean of its divisors is an integer number (2004408).

Almost surely, 212000531 is an apocalyptic number.

12000531 is a deficient number, since it is larger than the sum of its proper divisors (4034733).

12000531 is an equidigital number, since it uses as much as digits as its factorization.

12000531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 12000531 is about 3464.1782575381. The cubic root of 12000531 is about 228.9462253679.

Adding to 12000531 its reverse (13500021), we get a palindrome (25500552).

The spelling of 12000531 in words is "twelve million, five hundred thirty-one", and thus it is an aban number.

Divisors: 1 3 491 1473 8147 24441 4000177 12000531