42405211 has 4 divisors (see below), whose sum is σ = 42435000. Its totient is φ = 42375424.

The previous prime is 42405197. The next prime is 42405269. The reversal of 42405211 is 11250424.

42405211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42405211 - 2¹⁷ = 42274139 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 3 ways as a sum of consecutive naturals, for example, 12646 + ... + 15643.

It is an arithmetic number, because the mean of its divisors is an integer number (10608750).

Almost surely, 2^42405211 is an apocalyptic number.

42405211 is a deficient number, since it is larger than the sum of its proper divisors (29789).

42405211 is a wasteful number, since it uses less digits than its factorization.

42405211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29788.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 42405211 is about 6511.9283626281. The cubic root of 42405211 is about 348.7169649640.

Adding to 42405211 its reverse (11250424), we get a palindrome (53655635).

The spelling of 42405211 in words is "forty-two million, four hundred five thousand, two hundred eleven".