1203430421 has 2 divisors, whose sum is σ = 1203430422. Its totient is φ = 1203430420.

The previous prime is 1203430373. The next prime is 1203430457. The reversal of 1203430421 is 1240343021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935748100 + 267682321 = 30590^2 + 16361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203430421 - 2¹⁰ = 1203429397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203430393 and 1203430402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203430471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601715210 + 601715211.

It is an arithmetic number, because the mean of its divisors is an integer number (601715211).

Almost surely, 2^1203430421 is an apocalyptic number.

It is an amenable number.

1203430421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203430421 is an equidigital number, since it uses as much as digits as its factorization.

1203430421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1203430421 is about 34690.4946779374. The cubic root of 1203430421 is about 1063.6702075514.

Adding to 1203430421 its reverse (1240343021), we get a palindrome (2443773442).

The spelling of 1203430421 in words is "one billion, two hundred three million, four hundred thirty thousand, four hundred twenty-one".