27240427 has 2 divisors, whose sum is σ = 27240428. Its totient is φ = 27240426.

The previous prime is 27240403. The next prime is 27240439. The reversal of 27240427 is 72404272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27240427 - 2¹⁵ = 27207659 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27240395 and 27240404.

It is not a weakly prime, because it can be changed into another prime (27240467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13620213 + 13620214.

It is an arithmetic number, because the mean of its divisors is an integer number (13620214).

Almost surely, 2^27240427 is an apocalyptic number.

27240427 is a deficient number, since it is larger than the sum of its proper divisors (1).

27240427 is an equidigital number, since it uses as much as digits as its factorization.

27240427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 27240427 is about 5219.2362468085. The cubic root of 27240427 is about 300.8878402440.

Adding to 27240427 its reverse (72404272), we get a palindrome (99644699).

The spelling of 27240427 in words is "twenty-seven million, two hundred forty thousand, four hundred twenty-seven".