1023443421 has 128 divisors (see below), whose sum is σ = 1925210112. Its totient is φ = 466560000.

The previous prime is 1023443389. The next prime is 1023443423. The reversal of 1023443421 is 1243443201.

It is not a de Polignac number, because 1023443421 - 2⁵ = 1023443389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023443391 and 1023443400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023443423) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 6777696 + ... + 6777846.

It is an arithmetic number, because the mean of its divisors is an integer number (15040704).

Almost surely, 2^1023443421 is an apocalyptic number.

1023443421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1023443421 is a deficient number, since it is larger than the sum of its proper divisors (901766691).

1023443421 is a wasteful number, since it uses less digits than its factorization.

1023443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1023443421 is about 31991.3022710861. The cubic root of 1023443421 is about 1007.7541907787.

Adding to 1023443421 its reverse (1243443201), we get a palindrome (2266886622).

It can be divided in two parts, 1023 and 443421, that added together give a palindrome (444444).

The spelling of 1023443421 in words is "one billion, twenty-three million, four hundred forty-three thousand, four hundred twenty-one".