240256642 has 4 divisors (see below), whose sum is σ = 360384966. Its totient is φ = 120128320.

The previous prime is 240256637. The next prime is 240256649. The reversal of 240256642 is 246652042.

240256642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 189860841 + 50395801 = 13779^2 + 7099^2 .

It is not an unprimeable number, because it can be changed into a prime (240256649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60064159 + ... + 60064162.

Almost surely, 2^240256642 is an apocalyptic number.

240256642 is a deficient number, since it is larger than the sum of its proper divisors (120128324).

240256642 is a wasteful number, since it uses less digits than its factorization.

240256642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120128323.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 240256642 is about 15500.2142565837. The cubic root of 240256642 is about 621.6679351591.

The spelling of 240256642 in words is "two hundred forty million, two hundred fifty-six thousand, six hundred forty-two".