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12872355 = 351097873
BaseRepresentation
bin110001000110…
…101010100011
3220012222112220
4301012222203
511243403410
61135522123
7214261506
oct61065243
926188486
1012872355
1172a2211
124389343
1328890a2
1419d113d
1511e4070
hexc46aa3

12872355 has 16 divisors (see below), whose sum is σ = 20787360. Its totient is φ = 6801408.

The previous prime is 12872333. The next prime is 12872357. The reversal of 12872355 is 55327821.

It is not a de Polignac number, because 12872355 - 27 = 12872227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12872357) 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 15 ways as a sum of consecutive naturals, for example, 2302 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (1299210).

Almost surely, 212872355 is an apocalyptic number.

12872355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12872355 is a deficient number, since it is larger than the sum of its proper divisors (7915005).

12872355 is a wasteful number, since it uses less digits than its factorization.

12872355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7990.

The product of its digits is 16800, while the sum is 33.

The square root of 12872355 is about 3587.8064329058. The cubic root of 12872355 is about 234.3613563613.

It can be divided in two parts, 128723 and 55, that added together give a triangular number (128778 = T507).

The spelling of 12872355 in words is "twelve million, eight hundred seventy-two thousand, three hundred fifty-five".

Divisors: 1 3 5 15 109 327 545 1635 7873 23619 39365 118095 858157 2574471 4290785 12872355