1232440421 has 2 divisors, whose sum is σ = 1232440422. Its totient is φ = 1232440420.

The previous prime is 1232440399. The next prime is 1232440427. The reversal of 1232440421 is 1240442321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227731521 + 4708900 = 35039^2 + 2170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232440421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232440427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616220210 + 616220211.

It is an arithmetic number, because the mean of its divisors is an integer number (616220211).

Almost surely, 2^1232440421 is an apocalyptic number.

It is an amenable number.

1232440421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232440421 is an equidigital number, since it uses as much as digits as its factorization.

1232440421 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 1232440421 is about 35106.1308178500. The cubic root of 1232440421 is about 1072.1494107135.

Adding to 1232440421 its reverse (1240442321), we get a palindrome (2472882742).

The spelling of 1232440421 in words is "one billion, two hundred thirty-two million, four hundred forty thousand, four hundred twenty-one".