428135042 has 4 divisors (see below), whose sum is σ = 642202566. Its totient is φ = 214067520.

The previous prime is 428135009. The next prime is 428135051. The reversal of 428135042 is 240531824.

It is a happy number.

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., 262472401 + 165662641 = 16201^2 + 12871^2 .

It is a super-2 number, since 2×428135042² = 366599228376683528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428134996 and 428135014.

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, 107033759 + ... + 107033762.

Almost surely, 2^428135042 is an apocalyptic number.

428135042 is a deficient number, since it is larger than the sum of its proper divisors (214067524).

428135042 is a wasteful number, since it uses less digits than its factorization.

428135042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214067523.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 428135042 is about 20691.4243588981. The cubic root of 428135042 is about 753.6914555836.

Adding to 428135042 its reverse (240531824), we get a palindrome (668666866).

The spelling of 428135042 in words is "four hundred twenty-eight million, one hundred thirty-five thousand, forty-two".