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12872125 = 53747313
BaseRepresentation
bin110001000110…
…100110111101
3220012222020101
4301012212331
511243402000
61135521101
7214261030
oct61064675
926188211
1012872125
1172a2022
124389191
132888c56
1419d1017
1511e3e6a
hexc469bd

12872125 has 32 divisors (see below), whose sum is σ = 18809856. Its totient is φ = 8611200.

The previous prime is 12872117. The next prime is 12872131. The reversal of 12872125 is 52127821.

It is not a de Polignac number, because 12872125 - 23 = 12872117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12872093 and 12872102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40969 + ... + 41281.

It is an arithmetic number, because the mean of its divisors is an integer number (587808).

Almost surely, 212872125 is an apocalyptic number.

It is an amenable number.

12872125 is a deficient number, since it is larger than the sum of its proper divisors (5937731).

12872125 is an equidigital number, since it uses as much as digits as its factorization.

12872125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 372 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 12872125 is about 3587.7743797513. The cubic root of 12872125 is about 234.3599605164.

Adding to 12872125 its reverse (52127821), we get a palindrome (64999946).

The spelling of 12872125 in words is "twelve million, eight hundred seventy-two thousand, one hundred twenty-five".

Divisors: 1 5 7 25 35 47 125 175 235 313 329 875 1175 1565 1645 2191 5875 7825 8225 10955 14711 39125 41125 54775 73555 102977 273875 367775 514885 1838875 2574425 12872125