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12869881 = 291512939
BaseRepresentation
bin110001000110…
…000011111001
3220012212011021
4301012003321
511243314011
61135502441
7214251343
oct61060371
926185137
1012869881
1172a0372
124387a21
132887c1b
1419d0293
1511e3471
hexc460f9

12869881 has 8 divisors (see below), whose sum is σ = 13406400. Its totient is φ = 12339600.

The previous prime is 12869873. The next prime is 12869891. The reversal of 12869881 is 18896821.

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 12869881 - 23 = 12869873 is a prime.

It is a super-2 number, since 2×128698812 = 331267673908322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12869851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2910 + ... + 5848.

It is an arithmetic number, because the mean of its divisors is an integer number (1675800).

Almost surely, 212869881 is an apocalyptic number.

It is an amenable number.

12869881 is a deficient number, since it is larger than the sum of its proper divisors (536519).

12869881 is a wasteful number, since it uses less digits than its factorization.

12869881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119.

The product of its digits is 55296, while the sum is 43.

The square root of 12869881 is about 3587.4616374255. The cubic root of 12869881 is about 234.3463410528.

The spelling of 12869881 in words is "twelve million, eight hundred sixty-nine thousand, eight hundred eighty-one".

Divisors: 1 29 151 2939 4379 85231 443789 12869881