420042243 has 8 divisors (see below), whose sum is σ = 571972608. Its totient is φ = 274070024.

The previous prime is 420042221. The next prime is 420042257. The reversal of 420042243 is 342240024.

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 420042243 - 2⁵ = 420042211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420042263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489371 + ... + 1489652.

It is an arithmetic number, because the mean of its divisors is an integer number (71496576).

Almost surely, 2^420042243 is an apocalyptic number.

420042243 is a deficient number, since it is larger than the sum of its proper divisors (151930365).

420042243 is a wasteful number, since it uses less digits than its factorization.

420042243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979073.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 420042243 is about 20494.9321296754. The cubic root of 420042243 is about 748.9123452164.

Adding to 420042243 its reverse (342240024), we get a palindrome (762282267).

The spelling of 420042243 in words is "four hundred twenty million, forty-two thousand, two hundred forty-three".