242257679 has 4 divisors (see below), whose sum is σ = 244000680. Its totient is φ = 240514680.

The previous prime is 242257607. The next prime is 242257711. The reversal of 242257679 is 976752242.

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-242257679 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 (242257879) 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, 871292 + ... + 871569.

It is an arithmetic number, because the mean of its divisors is an integer number (61000170).

Almost surely, 2^242257679 is an apocalyptic number.

242257679 is a deficient number, since it is larger than the sum of its proper divisors (1743001).

242257679 is a wasteful number, since it uses less digits than its factorization.

242257679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743000.

The product of its digits is 423360, while the sum is 44.

The square root of 242257679 is about 15564.6290993393. The cubic root of 242257679 is about 623.3890708322.

The spelling of 242257679 in words is "two hundred forty-two million, two hundred fifty-seven thousand, six hundred seventy-nine".