42812939 has 10 divisors (see below), whose sum is σ = 46411500. Its totient is φ = 39493272.

The previous prime is 42812921. The next prime is 42812941. The reversal of 42812939 is 93921824.

It is a de Polignac number, because none of the positive numbers 2^k-42812939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42812969) 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 9 ways as a sum of consecutive naturals, for example, 27812 + ... + 29310.

It is an arithmetic number, because the mean of its divisors is an integer number (4641150).

Almost surely, 2^42812939 is an apocalyptic number.

42812939 is a deficient number, since it is larger than the sum of its proper divisors (3598561).

42812939 is an frugal number, since it uses more digits than its factorization.

42812939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 1512 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 42812939 is about 6543.1597107208. The cubic root of 42812939 is about 349.8310449843.

The spelling of 42812939 in words is "forty-two million, eight hundred twelve thousand, nine hundred thirty-nine".