1243032303421 has 4 divisors (see below), whose sum is σ = 1249540326144. Its totient is φ = 1236524280700.

The previous prime is 1243032303407. The next prime is 1243032303427.

It is a happy number.

1243032303421 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1243032303421 - 2¹⁹ = 1243031779133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243032303421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243032303427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3254011075 + ... + 3254011456.

It is an arithmetic number, because the mean of its divisors is an integer number (312385081536).

Almost surely, 2^{1243032303421} is an apocalyptic number.

It is an amenable number.

1243032303421 is a deficient number, since it is larger than the sum of its proper divisors (6508022723).

1243032303421 is an equidigital number, since it uses as much as digits as its factorization.

1243032303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508022722.

The product of its (nonzero) digits is 10368, while the sum is 28.

The spelling of 1243032303421 in words is "one trillion, two hundred forty-three billion, thirty-two million, three hundred three thousand, four hundred twenty-one".