27041221 has 4 divisors (see below), whose sum is σ = 27254272. Its totient is φ = 26828172.

The previous prime is 27041167. The next prime is 27041227. The reversal of 27041221 is 12214072.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27041221 - 2⁷ = 27041093 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 (27041227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106335 + ... + 106588.

It is an arithmetic number, because the mean of its divisors is an integer number (6813568).

Almost surely, 2^27041221 is an apocalyptic number.

It is an amenable number.

27041221 is a deficient number, since it is larger than the sum of its proper divisors (213051).

27041221 is a wasteful number, since it uses less digits than its factorization.

27041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213050.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 27041221 is about 5200.1174025208. The cubic root of 27041221 is about 300.1525927421.

Adding to 27041221 its reverse (12214072), we get a palindrome (39255293).

The spelling of 27041221 in words is "twenty-seven million, forty-one thousand, two hundred twenty-one".