1421203424 has 24 divisors (see below), whose sum is σ = 2799281520. Its totient is φ = 710274816.

The previous prime is 1421203391. The next prime is 1421203429. The reversal of 1421203424 is 4243021241.

It is a self number, because there is not a number n which added to its sum of digits gives 1421203424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421203429) 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 3 ways as a sum of consecutive naturals, for example, 70157 + ... + 88115.

It is an arithmetic number, because the mean of its divisors is an integer number (116636730).

Almost surely, 2^1421203424 is an apocalyptic number.

It is an amenable number.

1421203424 is a deficient number, since it is larger than the sum of its proper divisors (1378078096).

1421203424 is a wasteful number, since it uses less digits than its factorization.

1421203424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442 (or 20434 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1421203424 is about 37698.8517597022. The cubic root of 1421203424 is about 1124.3082955180.

Adding to 1421203424 its reverse (4243021241), we get a palindrome (5664224665).

The spelling of 1421203424 in words is "one billion, four hundred twenty-one million, two hundred three thousand, four hundred twenty-four".