420430042 has 8 divisors (see below), whose sum is σ = 633913236. Its totient is φ = 209125632.

The previous prime is 420430039. The next prime is 420430057. The reversal of 420430042 is 240034024.

It can be written as a sum of positive squares in 2 ways, for example, as 358004241 + 62425801 = 18921^2 + 7901^2 .

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

It is a super-2 number, since 2×420430042² = 353522840432243528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544213 + ... + 544984.

Almost surely, 2^420430042 is an apocalyptic number.

420430042 is a deficient number, since it is larger than the sum of its proper divisors (213483194).

420430042 is a wasteful number, since it uses less digits than its factorization.

420430042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089392.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 420430042 is about 20504.3907980705. The cubic root of 420430042 is about 749.1427491272.

Adding to 420430042 its reverse (240034024), we get a palindrome (660464066).

The spelling of 420430042 in words is "four hundred twenty million, four hundred thirty thousand, forty-two".