42405291 has 6 divisors (see below), whose sum is σ = 61252100. Its totient is φ = 28270188.

The previous prime is 42405287. The next prime is 42405313. The reversal of 42405291 is 19250424.

42405291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42405291 - 2² = 42405287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42405271) 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 5 ways as a sum of consecutive naturals, for example, 2355841 + ... + 2355858.

Almost surely, 2^42405291 is an apocalyptic number.

42405291 is a deficient number, since it is larger than the sum of its proper divisors (18846809).

42405291 is a wasteful number, since it uses less digits than its factorization.

42405291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711705 (or 4711702 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42405291 is about 6511.9345051989. The cubic root of 42405291 is about 348.7171842557.

The spelling of 42405291 in words is "forty-two million, four hundred five thousand, two hundred ninety-one".