1264663 has 2 divisors, whose sum is σ = 1264664. Its totient is φ = 1264662.

The previous prime is 1264657. The next prime is 1264667. The reversal of 1264663 is 3664621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264663 - 2¹⁷ = 1133591 is a prime.

1264663 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632331 + 632332.

It is an arithmetic number, because the mean of its divisors is an integer number (632332).

2^1264663 is an apocalyptic number.

1264663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264663 is an equidigital number, since it uses as much as digits as its factorization.

1264663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 1264663 is about 1124.5723631674. The cubic root of 1264663 is about 108.1413045233.

The spelling of 1264663 in words is "one million, two hundred sixty-four thousand, six hundred sixty-three".