240040042 has 12 divisors (see below), whose sum is σ = 395768898. Its totient is φ = 109109000.

The previous prime is 240040039. The next prime is 240040057.

240040042 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 188760121 + 51279921 = 13739^2 + 7161^2 .

It is a junction number, because it is equal to n+sod(n) for n = 240039998 and 240040025.

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, 495709 + ... + 496192.

Almost surely, 2^240040042 is an apocalyptic number.

240040042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

240040042 is a deficient number, since it is larger than the sum of its proper divisors (155728856).

240040042 is a wasteful number, since it uses less digits than its factorization.

240040042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991925 (or 991914 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 240040042 is about 15493.2256809226. The cubic root of 240040042 is about 621.4810603255.

The spelling of 240040042 in words is "two hundred forty million, forty thousand, forty-two".