1232404421 has 2 divisors, whose sum is σ = 1232404422. Its totient is φ = 1232404420.

The previous prime is 1232404403. The next prime is 1232404427. The reversal of 1232404421 is 1244042321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670240321 + 562164100 = 25889^2 + 23710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232404421 - 2⁶ = 1232404357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232404427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616202210 + 616202211.

It is an arithmetic number, because the mean of its divisors is an integer number (616202211).

Almost surely, 2^1232404421 is an apocalyptic number.

It is an amenable number.

1232404421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232404421 is an equidigital number, since it uses as much as digits as its factorization.

1232404421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1232404421 is about 35105.6180831502. The cubic root of 1232404421 is about 1072.1389713300.

Adding to 1232404421 its reverse (1244042321), we get a palindrome (2476446742).

Subtracting 1232404421 from its reverse (1244042321), we obtain a triangular number (11637900 = T₄₈₂₄).

The spelling of 1232404421 in words is "one billion, two hundred thirty-two million, four hundred four thousand, four hundred twenty-one".