1286503 has 2 divisors, whose sum is σ = 1286504. Its totient is φ = 1286502.

The previous prime is 1286491. The next prime is 1286513. The reversal of 1286503 is 3056821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1286503 - 2¹⁷ = 1155431 is a prime.

It is equal to p₉₉₀₇₀ and since 1286503 and 99070 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643251 + 643252.

It is an arithmetic number, because the mean of its divisors is an integer number (643252).

2^1286503 is an apocalyptic number.

1286503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286503 is an equidigital number, since it uses as much as digits as its factorization.

1286503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1286503 is about 1134.2411560158. The cubic root of 1286503 is about 108.7602676702.

The spelling of 1286503 in words is "one million, two hundred eighty-six thousand, five hundred three".