242647247 has 2 divisors, whose sum is σ = 242647248. Its totient is φ = 242647246.

The previous prime is 242647243. The next prime is 242647253. The reversal of 242647247 is 742746242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242647247 - 2² = 242647243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242647247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242647241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121323623 + 121323624.

It is an arithmetic number, because the mean of its divisors is an integer number (121323624).

Almost surely, 2^242647247 is an apocalyptic number.

242647247 is a deficient number, since it is larger than the sum of its proper divisors (1).

242647247 is an equidigital number, since it uses as much as digits as its factorization.

242647247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 38.

The square root of 242647247 is about 15577.1386011681. The cubic root of 242647247 is about 623.7230435618.

The spelling of 242647247 in words is "two hundred forty-two million, six hundred forty-seven thousand, two hundred forty-seven".