200042405 has 8 divisors (see below), whose sum is σ = 244580472. Its totient is φ = 157014208.

The previous prime is 200042357. The next prime is 200042419. The reversal of 200042405 is 504240002.

It can be written as a sum of positive squares in 4 ways, for example, as 1852321 + 198190084 = 1361^2 + 14078^2 .

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 200042405 - 2⁶ = 200042341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377174 + ... + 377703.

It is an arithmetic number, because the mean of its divisors is an integer number (30572559).

Almost surely, 2^200042405 is an apocalyptic number.

It is an amenable number.

200042405 is a deficient number, since it is larger than the sum of its proper divisors (44538067).

200042405 is an equidigital number, since it uses as much as digits as its factorization.

200042405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754935.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 200042405 is about 14143.6347874229. The cubic root of 200042405 is about 584.8448757126.

Adding to 200042405 its reverse (504240002), we get a palindrome (704282407).

The spelling of 200042405 in words is "two hundred million, forty-two thousand, four hundred five".