42221435 has 4 divisors (see below), whose sum is σ = 50665728. Its totient is φ = 33777144.

The previous prime is 42221407. The next prime is 42221437. The reversal of 42221435 is 53412224.

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 42221435 - 2¹² = 42217339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42221435.

It is not an unprimeable number, because it can be changed into a prime (42221437) 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, 4222139 + ... + 4222148.

It is an arithmetic number, because the mean of its divisors is an integer number (12666432).

Almost surely, 2^42221435 is an apocalyptic number.

42221435 is a deficient number, since it is larger than the sum of its proper divisors (8444293).

42221435 is an equidigital number, since it uses as much as digits as its factorization.

42221435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8444292.

The product of its digits is 1920, while the sum is 23.

The square root of 42221435 is about 6497.8023207851. The cubic root of 42221435 is about 348.2124781372.

Adding to 42221435 its reverse (53412224), we get a palindrome (95633659).

The spelling of 42221435 in words is "forty-two million, two hundred twenty-one thousand, four hundred thirty-five".