242417857 has 8 divisors (see below), whose sum is σ = 265400352. Its totient is φ = 219592800.

The previous prime is 242417839. The next prime is 242417863. The reversal of 242417857 is 758714242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242417857 - 2⁷ = 242417729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242417057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36123 + ... + 42304.

It is an arithmetic number, because the mean of its divisors is an integer number (33175044).

Almost surely, 2^242417857 is an apocalyptic number.

It is an amenable number.

242417857 is a deficient number, since it is larger than the sum of its proper divisors (22982495).

242417857 is a wasteful number, since it uses less digits than its factorization.

242417857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78719.

The product of its digits is 125440, while the sum is 40.

The square root of 242417857 is about 15569.7738262314. The cubic root of 242417857 is about 623.5264331315.

The spelling of 242417857 in words is "two hundred forty-two million, four hundred seventeen thousand, eight hundred fifty-seven".