40042052 has 6 divisors (see below), whose sum is σ = 70073598. Its totient is φ = 20021024.

The previous prime is 40042043. The next prime is 40042099. The reversal of 40042052 is 25024004.

40042052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 678976 = 6274^2 + 824^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40042052.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005253 + ... + 5005260.

It is an arithmetic number, because the mean of its divisors is an integer number (11678933).

Almost surely, 2^40042052 is an apocalyptic number.

It is an amenable number.

40042052 is a deficient number, since it is larger than the sum of its proper divisors (30031546).

40042052 is a wasteful number, since it uses less digits than its factorization.

40042052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010517 (or 10010515 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 40042052 is about 6327.8789495375. The cubic root of 40042052 is about 342.1149938758.

Adding to 40042052 its reverse (25024004), we get a palindrome (65066056).

The spelling of 40042052 in words is "forty million, forty-two thousand, fifty-two", and thus it is an eban number.