27052721 has 4 divisors (see below), whose sum is σ = 27065700. Its totient is φ = 27039744.

The previous prime is 27052717. The next prime is 27052723. The reversal of 27052721 is 12725072.

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 6250000 + 20802721 = 2500^2 + 4561^2 .

It is a cyclic number.

It is not a de Polignac number, because 27052721 - 2² = 27052717 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27052723) 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 3 ways as a sum of consecutive naturals, for example, 2576 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (6766425).

Almost surely, 2^27052721 is an apocalyptic number.

It is an amenable number.

27052721 is a deficient number, since it is larger than the sum of its proper divisors (12979).

27052721 is a wasteful number, since it uses less digits than its factorization.

27052721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12978.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 27052721 is about 5201.2230292499. The cubic root of 27052721 is about 300.1951360086.

Adding to 27052721 its reverse (12725072), we get a palindrome (39777793).

The spelling of 27052721 in words is "twenty-seven million, fifty-two thousand, seven hundred twenty-one".