1263943 has 2 divisors, whose sum is σ = 1263944. Its totient is φ = 1263942.

The previous prime is 1263931. The next prime is 1263947. The reversal of 1263943 is 3493621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263943 is a prime.

It is equal to p₉₇₄₆₂ and since 1263943 and 97462 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 (1263947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631971 + 631972.

It is an arithmetic number, because the mean of its divisors is an integer number (631972).

2^1263943 is an apocalyptic number.

1263943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263943 is an equidigital number, since it uses as much as digits as its factorization.

1263943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 1263943 is about 1124.2521959062. The cubic root of 1263943 is about 108.1207782329.

The spelling of 1263943 in words is "one million, two hundred sixty-three thousand, nine hundred forty-three".