242640642 has 16 divisors (see below), whose sum is σ = 485434080. Its totient is φ = 80854752.

The previous prime is 242640637. The next prime is 242640653. The reversal of 242640642 is 246046242.

242640642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33109 + ... + 39767.

It is an arithmetic number, because the mean of its divisors is an integer number (30339630).

Almost surely, 2^242640642 is an apocalyptic number.

242640642 is an abundant number, since it is smaller than the sum of its proper divisors (242793438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242640642 is a wasteful number, since it uses less digits than its factorization.

242640642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12737.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 242640642 is about 15576.9265903130. The cubic root of 242640642 is about 623.7173841417.

Adding to 242640642 its reverse (246046242), we get a palindrome (488686884).

The spelling of 242640642 in words is "two hundred forty-two million, six hundred forty thousand, six hundred forty-two".