42406535 has 4 divisors (see below), whose sum is σ = 50887848. Its totient is φ = 33925224.

The previous prime is 42406531. The next prime is 42406541. The reversal of 42406535 is 53560424.

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 42406535 - 2² = 42406531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42406498 and 42406507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42406531) 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, 4240649 + ... + 4240658.

It is an arithmetic number, because the mean of its divisors is an integer number (12721962).

Almost surely, 2^42406535 is an apocalyptic number.

42406535 is a deficient number, since it is larger than the sum of its proper divisors (8481313).

42406535 is an equidigital number, since it uses as much as digits as its factorization.

42406535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481312.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 42406535 is about 6512.0300214296. The cubic root of 42406535 is about 348.7205942070.

Adding to 42406535 its reverse (53560424), we get a palindrome (95966959).

The spelling of 42406535 in words is "forty-two million, four hundred six thousand, five hundred thirty-five".