426140042 has 4 divisors (see below), whose sum is σ = 639210066. Its totient is φ = 213070020.

The previous prime is 426140041. The next prime is 426140047. The reversal of 426140042 is 240041624.

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., 388917841 + 37222201 = 19721^2 + 6101^2 .

It is not an unprimeable number, because it can be changed into a prime (426140041) 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, 106535009 + ... + 106535012.

Almost surely, 2^426140042 is an apocalyptic number.

426140042 is a deficient number, since it is larger than the sum of its proper divisors (213070024).

426140042 is a wasteful number, since it uses less digits than its factorization.

426140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213070023.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 426140042 is about 20643.1596903187. The cubic root of 426140042 is about 752.5189625947.

Adding to 426140042 its reverse (240041624), we get a palindrome (666181666).

The spelling of 426140042 in words is "four hundred twenty-six million, one hundred forty thousand, forty-two".