42354145 has 4 divisors (see below), whose sum is σ = 50824980. Its totient is φ = 33883312.

The previous prime is 42354139. The next prime is 42354161. The reversal of 42354145 is 54145324.

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 15303744 + 27050401 = 3912^2 + 5201^2 .

It is a cyclic number.

It is not a de Polignac number, because 42354145 - 2⁵ = 42354113 is a prime.

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, 4235410 + ... + 4235419.

It is an arithmetic number, because the mean of its divisors is an integer number (12706245).

Almost surely, 2^42354145 is an apocalyptic number.

It is an amenable number.

42354145 is a deficient number, since it is larger than the sum of its proper divisors (8470835).

42354145 is an equidigital number, since it uses as much as digits as its factorization.

42354145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470834.

The product of its digits is 9600, while the sum is 28.

The square root of 42354145 is about 6508.0062231070. The cubic root of 42354145 is about 348.5769292381.

Adding to 42354145 its reverse (54145324), we get a palindrome (96499469).

The spelling of 42354145 in words is "forty-two million, three hundred fifty-four thousand, one hundred forty-five".