40321240042 has 32 divisors (see below), whose sum is σ = 62814482640. Its totient is φ = 19400808960.

The previous prime is 40321240031. The next prime is 40321240087. The reversal of 40321240042 is 24004212304.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 21094367121 + 19226872921 = 145239^2 + 138661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40321239995 and 40321240022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1386184 + ... + 1414972.

Almost surely, 2^40321240042 is an apocalyptic number.

40321240042 is a deficient number, since it is larger than the sum of its proper divisors (22493242598).

40321240042 is a wasteful number, since it uses less digits than its factorization.

40321240042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29098.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 40321240042 its reverse (24004212304), we get a palindrome (64325452346).

The spelling of 40321240042 in words is "forty billion, three hundred twenty-one million, two hundred forty thousand, forty-two".