42747751 has 4 divisors (see below), whose sum is σ = 43349904. Its totient is φ = 42145600.

The previous prime is 42747743. The next prime is 42747773. The reversal of 42747751 is 15774724.

42747751 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 not a de Polignac number, because 42747751 - 2³ = 42747743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42747751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42747451) 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, 300970 + ... + 301111.

It is an arithmetic number, because the mean of its divisors is an integer number (10837476).

Almost surely, 2^42747751 is an apocalyptic number.

42747751 is a deficient number, since it is larger than the sum of its proper divisors (602153).

42747751 is an equidigital number, since it uses as much as digits as its factorization.

42747751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602152.

The product of its digits is 54880, while the sum is 37.

The square root of 42747751 is about 6538.1764277205. The cubic root of 42747751 is about 349.6534011001.

The spelling of 42747751 in words is "forty-two million, seven hundred forty-seven thousand, seven hundred fifty-one".