42812020 has 12 divisors (see below), whose sum is σ = 89905284. Its totient is φ = 17124800.

The previous prime is 42811999. The next prime is 42812027. The reversal of 42812020 is 2021824.

It can be written as a sum of positive squares in 2 ways, for example, as 4545424 + 38266596 = 2132^2 + 6186^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42812027) 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, 1070281 + ... + 1070320.

It is an arithmetic number, because the mean of its divisors is an integer number (7492107).

Almost surely, 2^42812020 is an apocalyptic number.

It is an amenable number.

42812020 is an abundant number, since it is smaller than the sum of its proper divisors (47093264).

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

42812020 is a wasteful number, since it uses less digits than its factorization.

42812020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140610 (or 2140608 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 42812020 is about 6543.0894843338. The cubic root of 42812020 is about 349.8285418701.

Adding to 42812020 its reverse (2021824), we get a palindrome (44833844).

The spelling of 42812020 in words is "forty-two million, eight hundred twelve thousand, twenty".