27025681 has 4 divisors (see below), whose sum is σ = 27293364. Its totient is φ = 26758000.

The previous prime is 27025643. The next prime is 27025697. The reversal of 27025681 is 18652072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13075456 + 13950225 = 3616^2 + 3735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27025681 is a prime.

It is a super-2 number, since 2×27025681² = 1460774867027522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27025181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133690 + ... + 133891.

It is an arithmetic number, because the mean of its divisors is an integer number (6823341).

Almost surely, 2^27025681 is an apocalyptic number.

It is an amenable number.

27025681 is a deficient number, since it is larger than the sum of its proper divisors (267683).

27025681 is a wasteful number, since it uses less digits than its factorization.

27025681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267682.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 27025681 is about 5198.6229907544. The cubic root of 27025681 is about 300.0950846746.

The spelling of 27025681 in words is "twenty-seven million, twenty-five thousand, six hundred eighty-one".