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12887841 = 36916217
BaseRepresentation
bin110001001010…
…011100100001
3220020202210110
4301022130201
511244402331
61140121533
7214354611
oct61123441
926222713
1012887841
11730290a
1243962a9
132893155
1419d6a41
1511e8946
hexc4a721

12887841 has 8 divisors (see below), whose sum is σ = 17211424. Its totient is φ = 8578080.

The previous prime is 12887827. The next prime is 12887863. The reversal of 12887841 is 14878821.

It is a happy number.

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

It is not a de Polignac number, because 12887841 - 27 = 12887713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12887841.

It is not an unprimeable number, because it can be changed into a prime (12887341) 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, 1036 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (2151428).

Almost surely, 212887841 is an apocalyptic number.

12887841 is the 2073-rd octagonal number.

It is an amenable number.

12887841 is a deficient number, since it is larger than the sum of its proper divisors (4323583).

12887841 is an equidigital number, since it uses as much as digits as its factorization.

12887841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911.

The product of its digits is 28672, while the sum is 39.

The square root of 12887841 is about 3589.9639273954. The cubic root of 12887841 is about 234.4553009821.

The spelling of 12887841 in words is "twelve million, eight hundred eighty-seven thousand, eight hundred forty-one".

Divisors: 1 3 691 2073 6217 18651 4295947 12887841