42206635 has 4 divisors (see below), whose sum is σ = 50647968. Its totient is φ = 33765304.

The previous prime is 42206627. The next prime is 42206639. The reversal of 42206635 is 53660224.

It is a happy number.

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 42206635 - 2³ = 42206627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42206639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4220659 + ... + 4220668.

It is an arithmetic number, because the mean of its divisors is an integer number (12661992).

Almost surely, 2^42206635 is an apocalyptic number.

42206635 is a deficient number, since it is larger than the sum of its proper divisors (8441333).

42206635 is an equidigital number, since it uses as much as digits as its factorization.

42206635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8441332.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 42206635 is about 6496.6633743792. The cubic root of 42206635 is about 348.1717867447.

Adding to 42206635 its reverse (53660224), we get a palindrome (95866859).

The spelling of 42206635 in words is "forty-two million, two hundred six thousand, six hundred thirty-five".