27126981 has 20 divisors (see below), whose sum is σ = 46312992. Its totient is φ = 15500808.

The previous prime is 27126947. The next prime is 27126989. The reversal of 27126981 is 18962172.

It is not a de Polignac number, because 27126981 - 2¹³ = 27118789 is a prime.

It is a super-2 number, since 2×27126981² = 1471746196348722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27126989) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23355 + ... + 24488.

Almost surely, 2^27126981 is an apocalyptic number.

27126981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27126981 is a deficient number, since it is larger than the sum of its proper divisors (19186011).

27126981 is an equidigital number, since it uses as much as digits as its factorization.

27126981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47862 (or 47853 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 27126981 is about 5208.3568426136. The cubic root of 27126981 is about 300.4695646467.

The spelling of 27126981 in words is "twenty-seven million, one hundred twenty-six thousand, nine hundred eighty-one".