27282421 has 2 divisors, whose sum is σ = 27282422. Its totient is φ = 27282420.

The previous prime is 27282407. The next prime is 27282457. The reversal of 27282421 is 12428272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16719921 + 10562500 = 4089^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 27282421 - 2⁷ = 27282293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27282421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27282401) 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, 13641210 + 13641211.

It is an arithmetic number, because the mean of its divisors is an integer number (13641211).

Almost surely, 2^27282421 is an apocalyptic number.

It is an amenable number.

27282421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27282421 is an equidigital number, since it uses as much as digits as its factorization.

27282421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 28.

The square root of 27282421 is about 5223.2576999417. The cubic root of 27282421 is about 301.0423776715.

The spelling of 27282421 in words is "twenty-seven million, two hundred eighty-two thousand, four hundred twenty-one".