27506257 has 2 divisors, whose sum is σ = 27506258. Its totient is φ = 27506256.

The previous prime is 27506231. The next prime is 27506261. The reversal of 27506257 is 75260572.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13845841 + 13660416 = 3721^2 + 3696^2 .

It is a cyclic number.

It is not a de Polignac number, because 27506257 - 2²³ = 19117649 is a prime.

It is not a weakly prime, because it can be changed into another prime (27506267) 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 as a sum of consecutive naturals, namely, 13753128 + 13753129.

It is an arithmetic number, because the mean of its divisors is an integer number (13753129).

Almost surely, 2^27506257 is an apocalyptic number.

It is an amenable number.

27506257 is a deficient number, since it is larger than the sum of its proper divisors (1).

27506257 is an equidigital number, since it uses as much as digits as its factorization.

27506257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 27506257 is about 5244.6407884621. The cubic root of 27506257 is about 301.8634274219.

The spelling of 27506257 in words is "twenty-seven million, five hundred six thousand, two hundred fifty-seven".