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12911 is a prime number
BaseRepresentation
bin11001001101111
3122201012
43021233
5403121
6135435
752433
oct31157
918635
1012911
119778
12757b
135b52
1449c3
153c5b
hex326f

12911 has 2 divisors, whose sum is σ = 12912. Its totient is φ = 12910.

The previous prime is 12907. The next prime is 12917. The reversal of 12911 is 11921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12911 - 22 = 12907 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6455 + 6456.

It is an arithmetic number, because the mean of its divisors is an integer number (6456).

212911 is an apocalyptic number.

12911 is a deficient number, since it is larger than the sum of its proper divisors (1).

12911 is an equidigital number, since it uses as much as digits as its factorization.

12911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 14.

The square root of 12911 is about 113.6265813971. The cubic root of 12911 is about 23.4595652941.

Subtracting from 12911 its reverse (11921), we obtain a triangular number (990 = T44).

The spelling of 12911 in words is "twelve thousand, nine hundred eleven".