27001 has 8 divisors (see below), whose sum is σ = 30464. Its totient is φ = 23760.

The previous prime is 26993. The next prime is 27011. The reversal of 27001 is 10072.

It is a Cunningham number, because it is equal to 30³+1.

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 27001 - 2³ = 26993 is a prime.

It is an Ulam number.

It is a Duffinian number.

27001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (27011) 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, 370 + ... + 436.

It is an arithmetic number, because the mean of its divisors is an integer number (3808).

2²⁷⁰⁰¹ is an apocalyptic number.

It is an amenable number.

27001 is a deficient number, since it is larger than the sum of its proper divisors (3463).

27001 is a wasteful number, since it uses less digits than its factorization.

27001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 27001 is about 164.3198101265. The cubic root of 27001 is about 30.0003703658. Note that the first 3 decimals are identical.

Adding to 27001 its reverse (10072), we get a palindrome (37073).

It can be divided in two parts, 2700 and 1, that added together give a triangular number (2701 = T₇₃).

The spelling of 27001 in words is "twenty-seven thousand, one", and thus it is an iban number.