42354809 has 4 divisors (see below), whose sum is σ = 48405504. Its totient is φ = 36304116.

The previous prime is 42354797. The next prime is 42354811. The reversal of 42354809 is 90845324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42354809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42354859) by changing a digit.

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, 3025337 + ... + 3025350.

It is an arithmetic number, because the mean of its divisors is an integer number (12101376).

Almost surely, 2^42354809 is an apocalyptic number.

It is an amenable number.

42354809 is a deficient number, since it is larger than the sum of its proper divisors (6050695).

42354809 is an equidigital number, since it uses as much as digits as its factorization.

42354809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050694.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 42354809 is about 6508.0572369948. The cubic root of 42354809 is about 348.5787508140.

The spelling of 42354809 in words is "forty-two million, three hundred fifty-four thousand, eight hundred nine".