242678517 has 8 divisors (see below), whose sum is σ = 323647680. Its totient is φ = 161747520.

The previous prime is 242678503. The next prime is 242678537. The reversal of 242678517 is 715876242.

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

It is not a de Polignac number, because 242678517 - 2⁶ = 242678453 is a prime.

It is a super-2 number, since 2×242678517² = 117785725226638578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242678537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12717 + ... + 25437.

It is an arithmetic number, because the mean of its divisors is an integer number (40455960).

Almost surely, 2^242678517 is an apocalyptic number.

It is an amenable number.

242678517 is a deficient number, since it is larger than the sum of its proper divisors (80969163).

242678517 is a wasteful number, since it uses less digits than its factorization.

242678517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19083.

The product of its digits is 188160, while the sum is 42.

The square root of 242678517 is about 15578.1422833405. The cubic root of 242678517 is about 623.7498355160.

The spelling of 242678517 in words is "two hundred forty-two million, six hundred seventy-eight thousand, five hundred seventeen".