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12865672 = 231608209
BaseRepresentation
bin110001000101…
…000010001000
3220012122101101
4301011002020
511243200142
61135431144
7214233151
oct61050210
926178341
1012865672
117298196
1243854b4
132886031
1419cc928
1511e20b7
hexc45088

12865672 has 8 divisors (see below), whose sum is σ = 24123150. Its totient is φ = 6432832.

The previous prime is 12865667. The next prime is 12865681. The reversal of 12865672 is 27656821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9647236 + 3218436 = 3106^2 + 1794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×128656723 (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804097 + ... + 804112.

Almost surely, 212865672 is an apocalyptic number.

It is an amenable number.

12865672 is a deficient number, since it is larger than the sum of its proper divisors (11257478).

12865672 is a wasteful number, since it uses less digits than its factorization.

12865672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608215 (or 1608211 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 12865672 is about 3586.8749629726. The cubic root of 12865672 is about 234.3207911844.

The spelling of 12865672 in words is "twelve million, eight hundred sixty-five thousand, six hundred seventy-two".

Divisors: 1 2 4 8 1608209 3216418 6432836 12865672