27142505 has 8 divisors (see below), whose sum is σ = 35076552. Its totient is φ = 20043648.

The previous prime is 27142481. The next prime is 27142517. The reversal of 27142505 is 50524172.

It can be written as a sum of positive squares in 4 ways, for example, as 434281 + 26708224 = 659^2 + 5168^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 27142505 - 2⁶ = 27142441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 208724 + ... + 208853.

It is an arithmetic number, because the mean of its divisors is an integer number (4384569).

Almost surely, 2^27142505 is an apocalyptic number.

It is an amenable number.

27142505 is a deficient number, since it is larger than the sum of its proper divisors (7934047).

27142505 is a wasteful number, since it uses less digits than its factorization.

27142505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417595.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 27142505 is about 5209.8469267340. The cubic root of 27142505 is about 300.5268704464.

Adding to 27142505 its reverse (50524172), we get a palindrome (77666677).

The spelling of 27142505 in words is "twenty-seven million, one hundred forty-two thousand, five hundred five".