1263947 has 2 divisors, whose sum is σ = 1263948. Its totient is φ = 1263946.

The previous prime is 1263943. The next prime is 1263949. The reversal of 1263947 is 7493621.

It is a strong prime.

It is an emirp because it is prime and its reverse (7493621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263947 - 2² = 1263943 is a prime.

Together with 1263949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1263943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631973 + 631974.

It is an arithmetic number, because the mean of its divisors is an integer number (631974).

2^1263947 is an apocalyptic number.

1263947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263947 is an equidigital number, since it uses as much as digits as its factorization.

1263947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 1263947 is about 1124.2539748651. The cubic root of 1263947 is about 108.1208922894.

The spelling of 1263947 in words is "one million, two hundred sixty-three thousand, nine hundred forty-seven".