1200342042409 has 2 divisors, whose sum is σ = 1200342042410. Its totient is φ = 1200342042408.

The previous prime is 1200342042391. The next prime is 1200342042433. The reversal of 1200342042409 is 9042402430021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163043618025 + 37298424384 = 1078445^2 + 193128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200342042409 - 2¹⁵ = 1200342009641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200342042439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600171021204 + 600171021205.

It is an arithmetic number, because the mean of its divisors is an integer number (600171021205).

Almost surely, 2^{1200342042409} is an apocalyptic number.

It is an amenable number.

1200342042409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200342042409 is an equidigital number, since it uses as much as digits as its factorization.

1200342042409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 1200342042409 in words is "one trillion, two hundred billion, three hundred forty-two million, forty-two thousand, four hundred nine".