1263447 has 12 divisors (see below), whose sum is σ = 1849120. Its totient is φ = 831168.

The previous prime is 1263403. The next prime is 1263461. The reversal of 1263447 is 7443621.

It is not a de Polignac number, because 1263447 - 2⁷ = 1263319 is a prime.

It is a d-powerful number, because it can be written as 1 + 2⁹ + 6² + 3¹¹ + 4³ + 4⁹ + 7⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1263447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178 + ... + 1599.

2^1263447 is an apocalyptic number.

1263447 is a deficient number, since it is larger than the sum of its proper divisors (585673).

1263447 is a wasteful number, since it uses less digits than its factorization.

1263447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862 (or 1859 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 1263447 is about 1124.0315831862. The cubic root of 1263447 is about 108.1066333645.

The spelling of 1263447 in words is "one million, two hundred sixty-three thousand, four hundred forty-seven".