421443043 has 8 divisors (see below), whose sum is σ = 492850688. Its totient is φ = 352835784.

The previous prime is 421442969. The next prime is 421443049. The reversal of 421443043 is 340344124.

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

It is not a de Polignac number, because 421443043 - 2¹³ = 421434851 is a prime.

It is a super-2 number, since 2×421443043² = 355228476986199698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421442999 and 421443017.

It is not an unprimeable number, because it can be changed into a prime (421443049) by changing a digit.

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, 699771 + ... + 700372.

It is an arithmetic number, because the mean of its divisors is an integer number (61606336).

Almost surely, 2^421443043 is an apocalyptic number.

421443043 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

421443043 is a deficient number, since it is larger than the sum of its proper divisors (71407645).

421443043 is a wasteful number, since it uses less digits than its factorization.

421443043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400193.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 421443043 is about 20529.0779870894. The cubic root of 421443043 is about 749.7439380678.

Adding to 421443043 its reverse (340344124), we get a palindrome (761787167).

The spelling of 421443043 in words is "four hundred twenty-one million, four hundred forty-three thousand, forty-three".