27121306 has 4 divisors (see below), whose sum is σ = 40681962. Its totient is φ = 13560652.

The previous prime is 27121291. The next prime is 27121309. The reversal of 27121306 is 60312172.

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

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 4473225 = 4759^2 + 2115^2 .

It is not an unprimeable number, because it can be changed into a prime (27121309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6780325 + ... + 6780328.

Almost surely, 2^27121306 is an apocalyptic number.

27121306 is a deficient number, since it is larger than the sum of its proper divisors (13560656).

27121306 is a wasteful number, since it uses less digits than its factorization.

27121306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560655.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 27121306 is about 5207.8120165766. The cubic root of 27121306 is about 300.4486103097.

Adding to 27121306 its reverse (60312172), we get a palindrome (87433478).

The spelling of 27121306 in words is "twenty-seven million, one hundred twenty-one thousand, three hundred six".