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27121271 = 611094079
BaseRepresentation
bin110011101110…
…1011001110111
31220000220101112
41213131121313
523420340041
62405145235
7446345522
oct147353167
956026345
1027121271
1114344681
1290bb21b
1358078b8
14385dbb9
1525aadeb
hex19dd677

27121271 has 8 divisors (see below), whose sum is σ = 27825600. Its totient is φ = 26425440.

The previous prime is 27121229. The next prime is 27121291. The reversal of 27121271 is 17212172.

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

It is a cyclic number.

It is not a de Polignac number, because 27121271 - 218 = 26859127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4610 + ... + 8688.

It is an arithmetic number, because the mean of its divisors is an integer number (3478200).

Almost surely, 227121271 is an apocalyptic number.

27121271 is a deficient number, since it is larger than the sum of its proper divisors (704329).

27121271 is a wasteful number, since it uses less digits than its factorization.

27121271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249.

The product of its digits is 392, while the sum is 23.

The square root of 27121271 is about 5207.8086562392. The cubic root of 27121271 is about 300.4484810669.

Subtracting from 27121271 its reverse (17212172), we obtain a palindrome (9909099).

The spelling of 27121271 in words is "twenty-seven million, one hundred twenty-one thousand, two hundred seventy-one".

Divisors: 1 61 109 4079 6649 248819 444611 27121271