42049289 has 4 divisors (see below), whose sum is σ = 42117840. Its totient is φ = 41980740.

The previous prime is 42049283. The next prime is 42049303. The reversal of 42049289 is 98294024.

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-42049289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42049283) 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, 33347 + ... + 34584.

It is an arithmetic number, because the mean of its divisors is an integer number (10529460).

Almost surely, 2^42049289 is an apocalyptic number.

It is an amenable number.

42049289 is a deficient number, since it is larger than the sum of its proper divisors (68551).

42049289 is an equidigital number, since it uses as much as digits as its factorization.

42049289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68550.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 42049289 is about 6484.5423122993. The cubic root of 42049289 is about 347.7385874249.

The spelling of 42049289 in words is "forty-two million, forty-nine thousand, two hundred eighty-nine".