42421223 has 16 divisors (see below), whose sum is σ = 47925696. Its totient is φ = 37255680.

The previous prime is 42421219. The next prime is 42421231. The reversal of 42421223 is 32212424.

It is a cyclic number.

It is not a de Polignac number, because 42421223 - 2² = 42421219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42421195 and 42421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100553 + ... + 100973.

It is an arithmetic number, because the mean of its divisors is an integer number (2995356).

Almost surely, 2^42421223 is an apocalyptic number.

42421223 is a deficient number, since it is larger than the sum of its proper divisors (5504473).

42421223 is a wasteful number, since it uses less digits than its factorization.

42421223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794.

The product of its digits is 768, while the sum is 20.

The square root of 42421223 is about 6513.1576827220. The cubic root of 42421223 is about 348.7608507135.

Adding to 42421223 its reverse (32212424), we get a palindrome (74633647).

The spelling of 42421223 in words is "forty-two million, four hundred twenty-one thousand, two hundred twenty-three".