42398737 has 4 divisors (see below), whose sum is σ = 42416676. Its totient is φ = 42380800.

The previous prime is 42398723. The next prime is 42398743. The reversal of 42398737 is 73789324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23658496 + 18740241 = 4864^2 + 4329^2 .

It is a cyclic number.

It is not a de Polignac number, because 42398737 - 2¹¹ = 42396689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42398693 and 42398702.

It is not an unprimeable number, because it can be changed into a prime (42398717) 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, 4768 + ... + 10369.

It is an arithmetic number, because the mean of its divisors is an integer number (10604169).

Almost surely, 2^42398737 is an apocalyptic number.

It is an amenable number.

42398737 is a deficient number, since it is larger than the sum of its proper divisors (17939).

42398737 is a wasteful number, since it uses less digits than its factorization.

42398737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938.

The product of its digits is 254016, while the sum is 43.

The square root of 42398737 is about 6511.4312558761. The cubic root of 42398737 is about 348.6992178642.

The spelling of 42398737 in words is "forty-two million, three hundred ninety-eight thousand, seven hundred thirty-seven".