242720207 has 2 divisors, whose sum is σ = 242720208. Its totient is φ = 242720206.

The previous prime is 242720141. The next prime is 242720209. The reversal of 242720207 is 702027242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242720207 - 2⁸ = 242719951 is a prime.

It is a super-2 number, since 2×242720207² = 117826197772245698, which contains 22 as substring.

Together with 242720209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242720209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121360103 + 121360104.

It is an arithmetic number, because the mean of its divisors is an integer number (121360104).

Almost surely, 2^242720207 is an apocalyptic number.

242720207 is a deficient number, since it is larger than the sum of its proper divisors (1).

242720207 is an equidigital number, since it uses as much as digits as its factorization.

242720207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 242720207 is about 15579.4803186756. The cubic root of 242720207 is about 623.7855516863.

Adding to 242720207 its reverse (702027242), we get a palindrome (944747449).

The spelling of 242720207 in words is "two hundred forty-two million, seven hundred twenty thousand, two hundred seven".