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12872211 = 311390067
BaseRepresentation
bin110001000110…
…101000010011
3220012222100120
4301012220103
511243402321
61135521323
7214261212
oct61065023
926188316
1012872211
1172a20a0
124389243
132888cc1
1419d1079
1511e3ec6
hexc46a13

12872211 has 8 divisors (see below), whose sum is σ = 18723264. Its totient is φ = 7801320.

The previous prime is 12872183. The next prime is 12872227. The reversal of 12872211 is 11227821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12872211 - 215 = 12839443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12872231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195001 + ... + 195066.

It is an arithmetic number, because the mean of its divisors is an integer number (2340408).

Almost surely, 212872211 is an apocalyptic number.

12872211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12872211 is a deficient number, since it is larger than the sum of its proper divisors (5851053).

12872211 is a wasteful number, since it uses less digits than its factorization.

12872211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390081.

The product of its digits is 448, while the sum is 24.

The square root of 12872211 is about 3587.7863648774. The cubic root of 12872211 is about 234.3604824430.

The spelling of 12872211 in words is "twelve million, eight hundred seventy-two thousand, two hundred eleven".

Divisors: 1 3 11 33 390067 1170201 4290737 12872211