42735623 has 4 divisors (see below), whose sum is σ = 48840720. Its totient is φ = 36630528.

The previous prime is 42735619. The next prime is 42735673. The reversal of 42735623 is 32653724.

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 42735623 - 2² = 42735619 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 42735623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42735673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3052538 + ... + 3052551.

It is an arithmetic number, because the mean of its divisors is an integer number (12210180).

Almost surely, 2^42735623 is an apocalyptic number.

42735623 is a deficient number, since it is larger than the sum of its proper divisors (6105097).

42735623 is an equidigital number, since it uses as much as digits as its factorization.

42735623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105096.

The product of its digits is 30240, while the sum is 32.

The square root of 42735623 is about 6537.2488861906. The cubic root of 42735623 is about 349.6203311534.

The spelling of 42735623 in words is "forty-two million, seven hundred thirty-five thousand, six hundred twenty-three".