27741521 has 2 divisors, whose sum is σ = 27741522. Its totient is φ = 27741520.

The previous prime is 27741517. The next prime is 27741523. The reversal of 27741521 is 12514772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27300625 + 440896 = 5225^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 27741521 - 2² = 27741517 is a prime.

Together with 27741523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27741523) 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, 13870760 + 13870761.

It is an arithmetic number, because the mean of its divisors is an integer number (13870761).

Almost surely, 2^27741521 is an apocalyptic number.

It is an amenable number.

27741521 is a deficient number, since it is larger than the sum of its proper divisors (1).

27741521 is an equidigital number, since it uses as much as digits as its factorization.

27741521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3920, while the sum is 29.

The square root of 27741521 is about 5267.0220238765. The cubic root of 27741521 is about 302.7216088932.

The spelling of 27741521 in words is "twenty-seven million, seven hundred forty-one thousand, five hundred twenty-one".