1204343421 has 4 divisors (see below), whose sum is σ = 1605791232. Its totient is φ = 802895612.

The previous prime is 1204343419. The next prime is 1204343449. The reversal of 1204343421 is 1243434021.

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 1204343421 - 2¹ = 1204343419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1204343391 and 1204343400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204343401) 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, 200723901 + ... + 200723906.

It is an arithmetic number, because the mean of its divisors is an integer number (401447808).

Almost surely, 2^1204343421 is an apocalyptic number.

It is an amenable number.

1204343421 is a deficient number, since it is larger than the sum of its proper divisors (401447811).

1204343421 is an equidigital number, since it uses as much as digits as its factorization.

1204343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401447810.

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

The square root of 1204343421 is about 34703.6514073087. The cubic root of 1204343421 is about 1063.9391291825.

Adding to 1204343421 its reverse (1243434021), we get a palindrome (2447777442).

The spelling of 1204343421 in words is "one billion, two hundred four million, three hundred forty-three thousand, four hundred twenty-one".