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12868031 = 111768813
BaseRepresentation
bin110001000101…
…100110111111
3220012202121202
4301011212333
511243234111
61135450115
7214243061
oct61054677
926182552
1012868031
117299a40
12438693b
132887127
1419cd731
1511e2b3b
hexc459bf

12868031 has 8 divisors (see below), whose sum is σ = 14863824. Its totient is φ = 11009920.

The previous prime is 12868027. The next prime is 12868039. The reversal of 12868031 is 13086821.

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 12868031 - 22 = 12868027 is a prime.

It is a super-2 number, since 2×128680312 = 331172443633922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12867985 and 12868003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12868039) 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, 34220 + ... + 34593.

It is an arithmetic number, because the mean of its divisors is an integer number (1857978).

Almost surely, 212868031 is an apocalyptic number.

12868031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12868031 is a deficient number, since it is larger than the sum of its proper divisors (1995793).

12868031 is a wasteful number, since it uses less digits than its factorization.

12868031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68841.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 12868031 is about 3587.2037856804. The cubic root of 12868031 is about 234.3351116948.

The spelling of 12868031 in words is "twelve million, eight hundred sixty-eight thousand, thirty-one".

Divisors: 1 11 17 187 68813 756943 1169821 12868031