27240247 has 4 divisors (see below), whose sum is σ = 27436360. Its totient is φ = 27044136.

The previous prime is 27240233. The next prime is 27240259. The reversal of 27240247 is 74204272.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27240247 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 (27240217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97848 + ... + 98125.

It is an arithmetic number, because the mean of its divisors is an integer number (6859090).

Almost surely, 2^27240247 is an apocalyptic number.

27240247 is a deficient number, since it is larger than the sum of its proper divisors (196113).

27240247 is a wasteful number, since it uses less digits than its factorization.

27240247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196112.

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

The square root of 27240247 is about 5219.2190028777. The cubic root of 27240247 is about 300.8871775044.

The spelling of 27240247 in words is "twenty-seven million, two hundred forty thousand, two hundred forty-seven".