42309434 has 8 divisors (see below), whose sum is σ = 65652660. Its totient is φ = 20425216.

The previous prime is 42309419. The next prime is 42309439. The reversal of 42309434 is 43490324.

42309434 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 2 ways, for example, as 40998409 + 1311025 = 6403^2 + 1145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 42309397 and 42309406.

It is not an unprimeable number, because it can be changed into a prime (42309439) 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 in 3 ways as a sum of consecutive naturals, for example, 364679 + ... + 364794.

Almost surely, 2^42309434 is an apocalyptic number.

42309434 is a deficient number, since it is larger than the sum of its proper divisors (23343226).

42309434 is a wasteful number, since it uses less digits than its factorization.

42309434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729504.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 42309434 is about 6504.5702394547. The cubic root of 42309434 is about 348.4542280600.

Adding to 42309434 its reverse (43490324), we get a palindrome (85799758).

The spelling of 42309434 in words is "forty-two million, three hundred nine thousand, four hundred thirty-four".