1203421 has 2 divisors, whose sum is σ = 1203422. Its totient is φ = 1203420.

The previous prime is 1203361. The next prime is 1203437. The reversal of 1203421 is 1243021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 24025 = 1086^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203421 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601710 + 601711.

It is an arithmetic number, because the mean of its divisors is an integer number (601711).

2^1203421 is an apocalyptic number.

It is an amenable number.

1203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203421 is an equidigital number, since it uses as much as digits as its factorization.

1203421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1203421 is about 1097.0054694485. The cubic root of 1203421 is about 106.3667431913.

Adding to 1203421 its reverse (1243021), we get a palindrome (2446442).

The spelling of 1203421 in words is "one million, two hundred three thousand, four hundred twenty-one".