42226420 has 12 divisors (see below), whose sum is σ = 88675524. Its totient is φ = 16890560.

The previous prime is 42226411. The next prime is 42226421. The reversal of 42226420 is 2462224.

It can be written as a sum of positive squares in 2 ways, for example, as 23251684 + 18974736 = 4822^2 + 4356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42226391 and 42226400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42226421) 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, 1055641 + ... + 1055680.

It is an arithmetic number, because the mean of its divisors is an integer number (7389627).

Almost surely, 2^42226420 is an apocalyptic number.

It is an amenable number.

42226420 is an abundant number, since it is smaller than the sum of its proper divisors (46449104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42226420 is a wasteful number, since it uses less digits than its factorization.

42226420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111330 (or 2111328 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 42226420 is about 6498.1859006957. The cubic root of 42226420 is about 348.2261818471.

Adding to 42226420 its reverse (2462224), we get a palindrome (44688644).

The spelling of 42226420 in words is "forty-two million, two hundred twenty-six thousand, four hundred twenty".