801443421 has 24 divisors (see below), whose sum is σ = 1205251320. Its totient is φ = 512718336.

The previous prime is 801443399. The next prime is 801443443. The reversal of 801443421 is 124344108.

It is an interprime number because it is at equal distance from previous prime (801443399) and next prime (801443443).

It can be written as a sum of positive squares in 4 ways, for example, as 248535225 + 552908196 = 15765^2 + 23514^2 .

It is not a de Polignac number, because 801443421 - 2¹⁵ = 801410653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801443021) 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 23 ways as a sum of consecutive naturals, for example, 7825 + ... + 40793.

It is an arithmetic number, because the mean of its divisors is an integer number (50218805).

Almost surely, 2^801443421 is an apocalyptic number.

It is an amenable number.

801443421 is a deficient number, since it is larger than the sum of its proper divisors (403807899).

801443421 is a wasteful number, since it uses less digits than its factorization.

801443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33085 (or 33082 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 801443421 is about 28309.7760676414. The cubic root of 801443421 is about 928.8757451742.

Adding to 801443421 its reverse (124344108), we get a palindrome (925787529).

The spelling of 801443421 in words is "eight hundred one million, four hundred forty-three thousand, four hundred twenty-one".