1020403405243 has 2 divisors, whose sum is σ = 1020403405244. Its totient is φ = 1020403405242.

The previous prime is 1020403405181. The next prime is 1020403405271. The reversal of 1020403405243 is 3425043040201.

It is a happy number.

It is an a-pointer prime, because the next prime (1020403405271) can be obtained adding 1020403405243 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020403405243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020403405943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510201702621 + 510201702622.

It is an arithmetic number, because the mean of its divisors is an integer number (510201702622).

Almost surely, 2^{1020403405243} is an apocalyptic number.

1020403405243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020403405243 is an equidigital number, since it uses as much as digits as its factorization.

1020403405243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 1020403405243 its reverse (3425043040201), we get a palindrome (4445446445444).

The spelling of 1020403405243 in words is "one trillion, twenty billion, four hundred three million, four hundred five thousand, two hundred forty-three".