1263917 has 2 divisors, whose sum is σ = 1263918. Its totient is φ = 1263916.

The previous prime is 1263887. The next prime is 1263929. The reversal of 1263917 is 7193621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 67081 = 1094^2 + 259^2 .

It is an emirp because it is prime and its reverse (7193621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263917 - 2⁶ = 1263853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1263917.

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, 631958 + 631959.

It is an arithmetic number, because the mean of its divisors is an integer number (631959).

2^1263917 is an apocalyptic number.

It is an amenable number.

1263917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263917 is an equidigital number, since it uses as much as digits as its factorization.

1263917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 1263917 is about 1124.2406326050. The cubic root of 1263917 is about 108.1200368600.

The spelling of 1263917 in words is "one million, two hundred sixty-three thousand, nine hundred seventeen".