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12871804 = 2211292541
BaseRepresentation
bin110001000110…
…100001111100
3220012221210111
4301012201330
511243344204
61135515404
7214260061
oct61064174
926187714
1012871804
1172a1860
124388b64
132888a6a
1419d0c68
1511e3d04
hexc4687c

12871804 has 12 divisors (see below), whose sum is σ = 24573528. Its totient is φ = 5850800.

The previous prime is 12871799. The next prime is 12871811. The reversal of 12871804 is 40817821.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 146227 + ... + 146314.

It is an arithmetic number, because the mean of its divisors is an integer number (2047794).

Almost surely, 212871804 is an apocalyptic number.

It is an amenable number.

12871804 is a deficient number, since it is larger than the sum of its proper divisors (11701724).

12871804 is a wasteful number, since it uses less digits than its factorization.

12871804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292556 (or 292554 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 12871804 is about 3587.7296442179. The cubic root of 12871804 is about 234.3580123747.

The spelling of 12871804 in words is "twelve million, eight hundred seventy-one thousand, eight hundred four".

Divisors: 1 2 4 11 22 44 292541 585082 1170164 3217951 6435902 12871804