1171440 has 60 divisors (see below), whose sum is σ = 3936504. Its totient is φ = 312192.

The previous prime is 1171427. The next prime is 1171447. The reversal of 1171440 is 441711.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94 + ... + 1533.

2^1171440 is an apocalyptic number.

1171440 is a gapful number since it is divisible by the number (10) 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 1171440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968252).

1171440 is an abundant number, since it is smaller than the sum of its proper divisors (2765064).

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

1171440 is a wasteful number, since it uses less digits than its factorization.

1171440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1171440 is about 1082.3308181882. The cubic root of 1171440 is about 105.4160364564.

The spelling of 1171440 in words is "one million, one hundred seventy-one thousand, four hundred forty".