242705207 has 4 divisors (see below), whose sum is σ = 244194360. Its totient is φ = 241216056.

The previous prime is 242705189. The next prime is 242705249. The reversal of 242705207 is 702507242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702507242 = 2 ⋅351253621.

It is a cyclic number.

It is not a de Polignac number, because 242705207 - 2¹⁰ = 242704183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242705207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242705257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744332 + ... + 744657.

It is an arithmetic number, because the mean of its divisors is an integer number (61048590).

Almost surely, 2^242705207 is an apocalyptic number.

242705207 is a deficient number, since it is larger than the sum of its proper divisors (1489153).

242705207 is a wasteful number, since it uses less digits than its factorization.

242705207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489152.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 242705207 is about 15578.9989087874. The cubic root of 242705207 is about 623.7727015324.

The spelling of 242705207 in words is "two hundred forty-two million, seven hundred five thousand, two hundred seven".