242521678 has 12 divisors (see below), whose sum is σ = 423175752. Its totient is φ = 103937820.

The previous prime is 242521651. The next prime is 242521691. The reversal of 242521678 is 876125242.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1237258 + ... + 1237453.

It is an arithmetic number, because the mean of its divisors is an integer number (35264646).

Almost surely, 2^242521678 is an apocalyptic number.

242521678 is a deficient number, since it is larger than the sum of its proper divisors (180654074).

242521678 is a wasteful number, since it uses less digits than its factorization.

242521678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474727 (or 2474720 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 242521678 is about 15573.1075254748. The cubic root of 242521678 is about 623.6154335863.

The spelling of 242521678 in words is "two hundred forty-two million, five hundred twenty-one thousand, six hundred seventy-eight".