1263984 has 40 divisors (see below), whose sum is σ = 3459600. Its totient is φ = 396288.

The previous prime is 1263979. The next prime is 1264009. The reversal of 1263984 is 4893621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (86490).

2^1263984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729800).

1263984 is an abundant number, since it is smaller than the sum of its proper divisors (2195616).

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

1263984 is a wasteful number, since it uses less digits than its factorization.

1263984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577 (or 1571 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1263984 is about 1124.2704301012. The cubic root of 1263984 is about 108.1219473004.

The spelling of 1263984 in words is "one million, two hundred sixty-three thousand, nine hundred eighty-four".