40031042 has 4 divisors (see below), whose sum is σ = 60046566. Its totient is φ = 20015520.

The previous prime is 40031029. The next prime is 40031051. The reversal of 40031042 is 24013004.

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., 37442161 + 2588881 = 6119^2 + 1609^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007759 + ... + 10007762.

Almost surely, 2^40031042 is an apocalyptic number.

40031042 is a deficient number, since it is larger than the sum of its proper divisors (20015524).

40031042 is a wasteful number, since it uses less digits than its factorization.

40031042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20015523.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40031042 is about 6327.0089299763. The cubic root of 40031042 is about 342.0836349154.

Adding to 40031042 its reverse (24013004), we get a palindrome (64044046).

The spelling of 40031042 in words is "forty million, thirty-one thousand, forty-two".