42429445 has 4 divisors (see below), whose sum is σ = 50915340. Its totient is φ = 33943552.

The previous prime is 42429379. The next prime is 42429463. The reversal of 42429445 is 54492424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 35988001 = 2538^2 + 5999^2 .

It is a cyclic number.

It is not a de Polignac number, because 42429445 - 2¹⁵ = 42396677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42429445.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 4242940 + ... + 4242949.

It is an arithmetic number, because the mean of its divisors is an integer number (12728835).

Almost surely, 2^42429445 is an apocalyptic number.

It is an amenable number.

42429445 is a deficient number, since it is larger than the sum of its proper divisors (8485895).

42429445 is an equidigital number, since it uses as much as digits as its factorization.

42429445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8485894.

The product of its digits is 46080, while the sum is 34.

The square root of 42429445 is about 6513.7888360001. The cubic root of 42429445 is about 348.7833813108.

The spelling of 42429445 in words is "forty-two million, four hundred twenty-nine thousand, four hundred forty-five".