27457 has 2 divisors, whose sum is σ = 27458. Its totient is φ = 27456.

The previous prime is 27449. The next prime is 27479. The reversal of 27457 is 75472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16641 + 10816 = 129^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 27457 - 2³ = 27449 is a prime.

27457 is a lucky number.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (27407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13728 + 13729.

It is an arithmetic number, because the mean of its divisors is an integer number (13729).

2²⁷⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

27457 is a deficient number, since it is larger than the sum of its proper divisors (1).

27457 is an equidigital number, since it uses as much as digits as its factorization.

27457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1960, while the sum is 25.

The square root of 27457 is about 165.7015389186. The cubic root of 27457 is about 30.1683131823.

It can be divided in two parts, 27 and 457, that added together give a palindrome (484).

The spelling of 27457 in words is "twenty-seven thousand, four hundred fifty-seven".