1250020403 has 2 divisors, whose sum is σ = 1250020404. Its totient is φ = 1250020402.

The previous prime is 1250020381. The next prime is 1250020477. The reversal of 1250020403 is 3040200521.

It is a weak prime.

It is an emirp because it is prime and its reverse (3040200521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1250020403 - 2²⁶ = 1182911539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1250020103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625010201 + 625010202.

It is an arithmetic number, because the mean of its divisors is an integer number (625010202).

Almost surely, 2^1250020403 is an apocalyptic number.

1250020403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250020403 is an equidigital number, since it uses as much as digits as its factorization.

1250020403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1250020403 is about 35355.6276001431. The cubic root of 1250020403 is about 1077.2232059082.

Adding to 1250020403 its reverse (3040200521), we get a palindrome (4290220924).

The spelling of 1250020403 in words is "one billion, two hundred fifty million, twenty thousand, four hundred three".