200420042 has 16 divisors (see below), whose sum is σ = 304342920. Its totient is φ = 98976768.

The previous prime is 200420041. The next prime is 200420047. The reversal of 200420042 is 240024002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197430601 + 2989441 = 14051^2 + 1729^2 .

It is a junction number, because it is equal to n+sod(n) for n = 200419999 and 200420026.

It is not an unprimeable number, because it can be changed into a prime (200420041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156308 + ... + 157584.

Almost surely, 2^200420042 is an apocalyptic number.

200420042 is a deficient number, since it is larger than the sum of its proper divisors (103922878).

200420042 is a wasteful number, since it uses less digits than its factorization.

200420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 200420042 is about 14156.9785618260. The cubic root of 200420042 is about 585.2126647851.

Adding to 200420042 its reverse (240024002), we get a palindrome (440444044).

The spelling of 200420042 in words is "two hundred million, four hundred twenty thousand, forty-two".