42212020 has 24 divisors (see below), whose sum is σ = 93860424. Its totient is φ = 15891456.

The previous prime is 42212017. The next prime is 42212033. The reversal of 42212020 is 2021224.

It can be written as a sum of positive squares in 4 ways, for example, as 2547216 + 39664804 = 1596^2 + 6298^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61737 + ... + 62416.

It is an arithmetic number, because the mean of its divisors is an integer number (3910851).

Almost surely, 2^42212020 is an apocalyptic number.

It is an amenable number.

42212020 is an abundant number, since it is smaller than the sum of its proper divisors (51648404).

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

42212020 is a wasteful number, since it uses less digits than its factorization.

42212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124179 (or 124177 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42212020 is about 6497.0778046750. The cubic root of 42212020 is about 348.1865934636.

Adding to 42212020 its reverse (2021224), we get a palindrome (44233244).

It can be divided in two parts, 4221 and 2020, that added together give a square (6241 = 79²).

The spelling of 42212020 in words is "forty-two million, two hundred twelve thousand, twenty".