1243003421 has 16 divisors (see below), whose sum is σ = 1416942720. Its totient is φ = 1079358720.

The previous prime is 1243003417. The next prime is 1243003439.

1243003421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1243003421 - 2² = 1243003417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243003393 and 1243003402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243003471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201641 + ... + 207713.

It is an arithmetic number, because the mean of its divisors is an integer number (88558920).

Almost surely, 2^1243003421 is an apocalyptic number.

1243003421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1243003421 is a deficient number, since it is larger than the sum of its proper divisors (173939299).

1243003421 is a wasteful number, since it uses less digits than its factorization.

1243003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1243003421 is about 35256.2536438573. The cubic root of 1243003421 is about 1075.2037604745.

It can be divided in two parts, 124300 and 3421, that added together give a palindrome (127721).

The spelling of 1243003421 in words is "one billion, two hundred forty-three million, three thousand, four hundred twenty-one".