1243350421 has 2 divisors, whose sum is σ = 1243350422. Its totient is φ = 1243350420.

The previous prime is 1243350401. The next prime is 1243350431. The reversal of 1243350421 is 1240533421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 986902225 + 256448196 = 31415^2 + 16014^2 .

It is an emirp because it is prime and its reverse (1240533421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1243350421 - 2⁷ = 1243350293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243350401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621675210 + 621675211.

It is an arithmetic number, because the mean of its divisors is an integer number (621675211).

Almost surely, 2^1243350421 is an apocalyptic number.

It is an amenable number.

1243350421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243350421 is an equidigital number, since it uses as much as digits as its factorization.

1243350421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1243350421 is about 35261.1744132268. The cubic root of 1243350421 is about 1075.3038033721.

Adding to 1243350421 its reverse (1240533421), we get a palindrome (2483883842).

The spelling of 1243350421 in words is "one billion, two hundred forty-three million, three hundred fifty thousand, four hundred twenty-one".