1266583 has 2 divisors, whose sum is σ = 1266584. Its totient is φ = 1266582.

The previous prime is 1266563. The next prime is 1266589. The reversal of 1266583 is 3856621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266583 is a prime.

1266583 is a lucky number.

It is equal to p₉₇₆₆₃ and since 1266583 and 97663 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 (1266589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633291 + 633292.

It is an arithmetic number, because the mean of its divisors is an integer number (633292).

2^1266583 is an apocalyptic number.

1266583 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266583 is an equidigital number, since it uses as much as digits as its factorization.

1266583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 1266583 is about 1125.4256972364. The cubic root of 1266583 is about 108.1960032372.

It can be divided in two parts, 1266 and 583, that added together give a square (1849 = 43²).

The spelling of 1266583 in words is "one million, two hundred sixty-six thousand, five hundred eighty-three".