1286533 has 2 divisors, whose sum is σ = 1286534. Its totient is φ = 1286532.

The previous prime is 1286521. The next prime is 1286557. The reversal of 1286533 is 3356821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014049 + 272484 = 1007^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286533 - 2¹³ = 1278341 is a prime.

1286533 is a lucky number.

It is equal to p₉₉₀₇₃ and since 1286533 and 99073 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 (1286503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643266 + 643267.

It is an arithmetic number, because the mean of its divisors is an integer number (643267).

2^1286533 is an apocalyptic number.

It is an amenable number.

1286533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286533 is an equidigital number, since it uses as much as digits as its factorization.

1286533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 1286533 is about 1134.2543806395. The cubic root of 1286533 is about 108.7611130582.

The spelling of 1286533 in words is "one million, two hundred eighty-six thousand, five hundred thirty-three".