27340421 has 4 divisors (see below), whose sum is σ = 27856332. Its totient is φ = 26824512.

The previous prime is 27340409. The next prime is 27340441. The reversal of 27340421 is 12404372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14737921 + 12602500 = 3839^2 + 3550^2 .

It is a cyclic number.

It is not a de Polignac number, because 27340421 - 2²² = 23146117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27340441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257876 + ... + 257981.

It is an arithmetic number, because the mean of its divisors is an integer number (6964083).

Almost surely, 2^27340421 is an apocalyptic number.

It is an amenable number.

27340421 is a deficient number, since it is larger than the sum of its proper divisors (515911).

27340421 is an equidigital number, since it uses as much as digits as its factorization.

27340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515910.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 27340421 is about 5228.8068428658. The cubic root of 27340421 is about 301.2555564478.

Adding to 27340421 its reverse (12404372), we get a palindrome (39744793).

The spelling of 27340421 in words is "twenty-seven million, three hundred forty thousand, four hundred twenty-one".