1263271 has 4 divisors (see below), whose sum is σ = 1265544. Its totient is φ = 1261000.

The previous prime is 1263263. The next prime is 1263299. The reversal of 1263271 is 1723621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1263271 - 2³ = 1263263 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (316386).

2^1263271 is an apocalyptic number.

1263271 is a deficient number, since it is larger than the sum of its proper divisors (2273).

1263271 is an equidigital number, since it uses as much as digits as its factorization.

1263271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272.

The product of its digits is 504, while the sum is 22.

The square root of 1263271 is about 1123.9532908444. The cubic root of 1263271 is about 108.1016133277.

Adding to 1263271 its reverse (1723621), we get a palindrome (2986892).

The spelling of 1263271 in words is "one million, two hundred sixty-three thousand, two hundred seventy-one".