242257879 has 2 divisors, whose sum is σ = 242257880. Its totient is φ = 242257878.

The previous prime is 242257877. The next prime is 242257933. The reversal of 242257879 is 978752242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242257879 - 2¹ = 242257877 is a prime.

Together with 242257877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242257877) 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 as a sum of consecutive naturals, namely, 121128939 + 121128940.

It is an arithmetic number, because the mean of its divisors is an integer number (121128940).

Almost surely, 2^242257879 is an apocalyptic number.

242257879 is a deficient number, since it is larger than the sum of its proper divisors (1).

242257879 is an equidigital number, since it uses as much as digits as its factorization.

242257879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 242257879 is about 15564.6355241618. The cubic root of 242257879 is about 623.3892423821.

It can be divided in two parts, 242 and 257879, that added together give a triangular number (258121 = T₇₁₈).

The spelling of 242257879 in words is "two hundred forty-two million, two hundred fifty-seven thousand, eight hundred seventy-nine".