1163646 has 40 divisors (see below), whose sum is σ = 2848824. Its totient is φ = 352080.

The previous prime is 1163641. The next prime is 1163651. The reversal of 1163646 is 6463611.

1163646 is a `hidden beast` number, since 1 + 16 + 3 + 646 = 666.

It is an interprime number because it is at equal distance from previous prime (1163641) and next prime (1163651).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163641) 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 19 ways as a sum of consecutive naturals, for example, 1456 + ... + 2108.

2^1163646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1163646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424412).

1163646 is an abundant number, since it is smaller than the sum of its proper divisors (1685178).

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

1163646 is a wasteful number, since it uses less digits than its factorization.

1163646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 669 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1163646 is about 1078.7242465060. The cubic root of 1163646 is about 105.1817261170.

The spelling of 1163646 in words is "one million, one hundred sixty-three thousand, six hundred forty-six".