1600043421 has 8 divisors (see below), whose sum is σ = 2155385344. Its totient is φ = 1055698560.

The previous prime is 1600043411. The next prime is 1600043443. The reversal of 1600043421 is 1243400061.

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

It is not a de Polignac number, because 1600043421 - 2²² = 1595849117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600043411) 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, 2748925 + ... + 2749506.

It is an arithmetic number, because the mean of its divisors is an integer number (269423168).

Almost surely, 2^1600043421 is an apocalyptic number.

It is an amenable number.

1600043421 is a deficient number, since it is larger than the sum of its proper divisors (555341923).

1600043421 is an equidigital number, since it uses as much as digits as its factorization.

1600043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5498531.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1600043421 is about 40000.5427588177. The cubic root of 1600043421 is about 1169.6176755040.

Adding to 1600043421 its reverse (1243400061), we get a palindrome (2843443482).

The spelling of 1600043421 in words is "one billion, six hundred million, forty-three thousand, four hundred twenty-one".