42421122 has 24 divisors (see below), whose sum is σ = 92058876. Its totient is φ = 14117856.

The previous prime is 42421121. The next prime is 42421123. The reversal of 42421122 is 22112424.

It is an interprime number because it is at equal distance from previous prime (42421121) and next prime (42421123).

It can be written as a sum of positive squares in 2 ways, for example, as 41100921 + 1320201 = 6411^2 + 1149^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42421095 and 42421104.

It is not an unprimeable number, because it can be changed into a prime (42421121) 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 11 ways as a sum of consecutive naturals, for example, 12868 + ... + 15824.

Almost surely, 2^42421122 is an apocalyptic number.

42421122 is an abundant number, since it is smaller than the sum of its proper divisors (49637754).

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

42421122 is a wasteful number, since it uses less digits than its factorization.

42421122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762 (or 3759 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 42421122 is about 6513.1499291817. The cubic root of 42421122 is about 348.7605739269.

Adding to 42421122 its reverse (22112424), we get a palindrome (64533546).

The spelling of 42421122 in words is "forty-two million, four hundred twenty-one thousand, one hundred twenty-two".