1263856 has 40 divisors (see below), whose sum is σ = 2749824. Its totient is φ = 557760.

The previous prime is 1263853. The next prime is 1263863. The reversal of 1263856 is 6583621.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7485 + ... + 7651.

2^1263856 is an apocalyptic number.

1263856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374912).

1263856 is an abundant number, since it is smaller than the sum of its proper divisors (1485968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263856 is a wasteful number, since it uses less digits than its factorization.

1263856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 223 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1263856 is about 1124.2135028543. The cubic root of 1263856 is about 108.1182974450.

The spelling of 1263856 in words is "one million, two hundred sixty-three thousand, eight hundred fifty-six".