42388705 has 4 divisors (see below), whose sum is σ = 50866452. Its totient is φ = 33910960.

The previous prime is 42388679. The next prime is 42388721. The reversal of 42388705 is 50788324.

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 9314704 + 33074001 = 3052^2 + 5751^2 .

It is not a de Polignac number, because 42388705 - 2²¹ = 40291553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4238866 + ... + 4238875.

It is an arithmetic number, because the mean of its divisors is an integer number (12716613).

Almost surely, 2^42388705 is an apocalyptic number.

It is an amenable number.

42388705 is a deficient number, since it is larger than the sum of its proper divisors (8477747).

42388705 is an equidigital number, since it uses as much as digits as its factorization.

42388705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8477746.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 42388705 is about 6510.6608727532. The cubic root of 42388705 is about 348.6717136920.

The spelling of 42388705 in words is "forty-two million, three hundred eighty-eight thousand, seven hundred five".