Search a number
12816271 = 13985867
BaseRepresentation
bin110000111000…
…111110001111
3220010010121201
4300320332033
511240110041
61134410331
7213636136
oct60707617
926103551
1012816271
117264066
1243609a7
1328696c0
1419b891d
1511d2631
hexc38f8f

12816271 has 4 divisors (see below), whose sum is σ = 13802152. Its totient is φ = 11830392.

The previous prime is 12816269. The next prime is 12816277. The reversal of 12816271 is 17261821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17261821 = 20838287.

It is a cyclic number.

It is not a de Polignac number, because 12816271 - 21 = 12816269 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492921 + ... + 492946.

It is an arithmetic number, because the mean of its divisors is an integer number (3450538).

Almost surely, 212816271 is an apocalyptic number.

12816271 is a deficient number, since it is larger than the sum of its proper divisors (985881).

12816271 is an equidigital number, since it uses as much as digits as its factorization.

12816271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985880.

The product of its digits is 1344, while the sum is 28.

The square root of 12816271 is about 3579.9819831949. The cubic root of 12816271 is about 234.0204951976.

The spelling of 12816271 in words is "twelve million, eight hundred sixteen thousand, two hundred seventy-one".

Divisors: 1 13 985867 12816271