27120981 has 8 divisors (see below), whose sum is σ = 36245440. Its totient is φ = 18038592.

The previous prime is 27120971. The next prime is 27120983. The reversal of 27120981 is 18902172.

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

It is not a de Polignac number, because 27120981 - 2⁵ = 27120949 is a prime.

It is a super-2 number, since 2×27120981² = 1471095220804722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27120983) 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, 8980 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (4530680).

Almost surely, 2^27120981 is an apocalyptic number.

It is an amenable number.

27120981 is a deficient number, since it is larger than the sum of its proper divisors (9124459).

27120981 is a wasteful number, since it uses less digits than its factorization.

27120981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21035.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 27120981 is about 5207.7808133599. The cubic root of 27120981 is about 300.4474101931.

The spelling of 27120981 in words is "twenty-seven million, one hundred twenty thousand, nine hundred eighty-one".