42020751 has 8 divisors (see below), whose sum is σ = 56066560. Its totient is φ = 27994392.

The previous prime is 42020743. The next prime is 42020791. The reversal of 42020751 is 15702024.

42020751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42020751 - 2³ = 42020743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1296 + ... + 9258.

It is an arithmetic number, because the mean of its divisors is an integer number (7008320).

Almost surely, 2^42020751 is an apocalyptic number.

42020751 is a deficient number, since it is larger than the sum of its proper divisors (14045809).

42020751 is a wasteful number, since it uses less digits than its factorization.

42020751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9725.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 42020751 is about 6482.3414751153. The cubic root of 42020751 is about 347.6599019116.

Adding to 42020751 its reverse (15702024), we get a palindrome (57722775).

The spelling of 42020751 in words is "forty-two million, twenty thousand, seven hundred fifty-one".