1200342421 has 2 divisors, whose sum is σ = 1200342422. Its totient is φ = 1200342420.

The previous prime is 1200342397. The next prime is 1200342449. The reversal of 1200342421 is 1242430021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1038772900 + 161569521 = 32230^2 + 12711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200342421 - 2⁷ = 1200342293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200342821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600171210 + 600171211.

It is an arithmetic number, because the mean of its divisors is an integer number (600171211).

Almost surely, 2^1200342421 is an apocalyptic number.

It is an amenable number.

1200342421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200342421 is an equidigital number, since it uses as much as digits as its factorization.

1200342421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1200342421 is about 34645.9582202600. The cubic root of 1200342421 is about 1062.7596364061.

Adding to 1200342421 its reverse (1242430021), we get a palindrome (2442772442).

The spelling of 1200342421 in words is "one billion, two hundred million, three hundred forty-two thousand, four hundred twenty-one".