27061221 has 8 divisors (see below), whose sum is σ = 39361824. Its totient is φ = 16400720.

The previous prime is 27061211. The next prime is 27061241. The reversal of 27061221 is 12216072.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27061221 - 2¹⁰ = 27060197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27061211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409986 + ... + 410051.

It is an arithmetic number, because the mean of its divisors is an integer number (4920228).

Almost surely, 2^27061221 is an apocalyptic number.

It is an amenable number.

27061221 is a deficient number, since it is larger than the sum of its proper divisors (12300603).

27061221 is a wasteful number, since it uses less digits than its factorization.

27061221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820051.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 27061221 is about 5202.0400805838. The cubic root of 27061221 is about 300.2265732832.

Adding to 27061221 its reverse (12216072), we get a palindrome (39277293).

The spelling of 27061221 in words is "twenty-seven million, sixty-one thousand, two hundred twenty-one".