27120681 has 12 divisors (see below), whose sum is σ = 44770752. Its totient is φ = 15497496.

The previous prime is 27120677. The next prime is 27120689. The reversal of 27120681 is 18602172.

It is not a de Polignac number, because 27120681 - 2² = 27120677 is a prime.

It is a super-3 number, since 3×27120681³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27120689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215181 + ... + 215306.

It is an arithmetic number, because the mean of its divisors is an integer number (3730896).

Almost surely, 2^27120681 is an apocalyptic number.

27120681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27120681 is a deficient number, since it is larger than the sum of its proper divisors (17650071).

27120681 is a wasteful number, since it uses less digits than its factorization.

27120681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430500 (or 430497 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 27120681 is about 5207.7520102248. The cubic root of 27120681 is about 300.4463023847.

The spelling of 27120681 in words is "twenty-seven million, one hundred twenty thousand, six hundred eighty-one".