403400042 has 4 divisors (see below), whose sum is σ = 605100066. Its totient is φ = 201700020.

The previous prime is 403400033. The next prime is 403400047. The reversal of 403400042 is 240004304.

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., 328733161 + 74666881 = 18131^2 + 8641^2 .

It is not an unprimeable number, because it can be changed into a prime (403400047) by changing a digit.

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, 100850009 + ... + 100850012.

Almost surely, 2^403400042 is an apocalyptic number.

403400042 is a deficient number, since it is larger than the sum of its proper divisors (201700024).

403400042 is a wasteful number, since it uses less digits than its factorization.

403400042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201700023.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 403400042 is about 20084.8211841679. The cubic root of 403400042 is about 738.8880560774. Note that the first 3 decimals are identical.

Adding to 403400042 its reverse (240004304), we get a palindrome (643404346).

The spelling of 403400042 in words is "four hundred three million, four hundred thousand, forty-two".