42065623 has 4 divisors (see below), whose sum is σ = 42859368. Its totient is φ = 41271880.

The previous prime is 42065603. The next prime is 42065629. The reversal of 42065623 is 32656024.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42065623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42065591 and 42065600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42065629) 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, 396793 + ... + 396898.

It is an arithmetic number, because the mean of its divisors is an integer number (10714842).

Almost surely, 2^42065623 is an apocalyptic number.

42065623 is a deficient number, since it is larger than the sum of its proper divisors (793745).

42065623 is an equidigital number, since it uses as much as digits as its factorization.

42065623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793744.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 42065623 is about 6485.8016466741. The cubic root of 42065623 is about 347.7836078198.

The spelling of 42065623 in words is "forty-two million, sixty-five thousand, six hundred twenty-three".