1267663 has 2 divisors, whose sum is σ = 1267664. Its totient is φ = 1267662.

The previous prime is 1267649. The next prime is 1267681. The reversal of 1267663 is 3667621.

It is a weak prime.

It is an emirp because it is prime and its reverse (3667621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1267663 - 2⁹ = 1267151 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1267613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633831 + 633832.

It is an arithmetic number, because the mean of its divisors is an integer number (633832).

2^1267663 is an apocalyptic number.

1267663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267663 is an equidigital number, since it uses as much as digits as its factorization.

1267663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 1267663 is about 1125.9054134340. The cubic root of 1267663 is about 108.2267469749.

The spelling of 1267663 in words is "one million, two hundred sixty-seven thousand, six hundred sixty-three".