1171664 has 40 divisors (see below), whose sum is σ = 2520672. Its totient is φ = 524160.

The previous prime is 1171661. The next prime is 1171669. The reversal of 1171664 is 4661711.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171661) 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, 8879 + ... + 9009.

2^1171664 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 1171664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260336).

1171664 is an abundant number, since it is smaller than the sum of its proper divisors (1349008).

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

1171664 is a wasteful number, since it uses less digits than its factorization.

1171664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 1171664 is about 1082.4342936179. The cubic root of 1171664 is about 105.4227551636.

The spelling of 1171664 in words is "one million, one hundred seventy-one thousand, six hundred sixty-four".