1301021503 has 2 divisors, whose sum is σ = 1301021504. Its totient is φ = 1301021502.

The previous prime is 1301021443. The next prime is 1301021507. The reversal of 1301021503 is 3051201031.

It is a strong prime.

It is an emirp because it is prime and its reverse (3051201031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1301021503 - 2¹⁷ = 1300890431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301021507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650510751 + 650510752.

It is an arithmetic number, because the mean of its divisors is an integer number (650510752).

Almost surely, 2^1301021503 is an apocalyptic number.

1301021503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301021503 is an equidigital number, since it uses as much as digits as its factorization.

1301021503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1301021503 is about 36069.6756708457. The cubic root of 1301021503 is about 1091.6786700413.

Adding to 1301021503 its reverse (3051201031), we get a palindrome (4352222534).

The spelling of 1301021503 in words is "one billion, three hundred one million, twenty-one thousand, five hundred three".