42403205 has 8 divisors (see below), whose sum is σ = 54798072. Its totient is φ = 31313088.

The previous prime is 42403189. The next prime is 42403213. The reversal of 42403205 is 50230424.

It can be written as a sum of positive squares in 4 ways, for example, as 813604 + 41589601 = 902^2 + 6449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42403205 - 2⁴ = 42403189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326114 + ... + 326243.

It is an arithmetic number, because the mean of its divisors is an integer number (6849759).

Almost surely, 2^42403205 is an apocalyptic number.

It is an amenable number.

42403205 is a deficient number, since it is larger than the sum of its proper divisors (12394867).

42403205 is a wasteful number, since it uses less digits than its factorization.

42403205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652375.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 42403205 is about 6511.7743357706. The cubic root of 42403205 is about 348.7114661330.

Adding to 42403205 its reverse (50230424), we get a palindrome (92633629).

The spelling of 42403205 in words is "forty-two million, four hundred three thousand, two hundred five".