42388751 has 4 divisors (see below), whose sum is σ = 42546600. Its totient is φ = 42230904.

The previous prime is 42388741. The next prime is 42388763. The reversal of 42388751 is 15788324.

42388751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42388751 - 2¹⁴ = 42372367 is a prime.

It is a super-4 number, since 4×42388751⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42388721) 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 3 ways as a sum of consecutive naturals, for example, 78521 + ... + 79058.

It is an arithmetic number, because the mean of its divisors is an integer number (10636650).

Almost surely, 2^42388751 is an apocalyptic number.

42388751 is a deficient number, since it is larger than the sum of its proper divisors (157849).

42388751 is a wasteful number, since it uses less digits than its factorization.

42388751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157848.

The product of its digits is 53760, while the sum is 38.

The square root of 42388751 is about 6510.6644054198. The cubic root of 42388751 is about 348.6718398175.

The spelling of 42388751 in words is "forty-two million, three hundred eighty-eight thousand, seven hundred fifty-one".