1171240 has 64 divisors (see below), whose sum is σ = 3110400. Its totient is φ = 388608.

The previous prime is 1171231. The next prime is 1171241. The reversal of 1171240 is 421711.

It is not an unprimeable number, because it can be changed into a prime (1171241) 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 15 ways as a sum of consecutive naturals, for example, 13116 + ... + 13204.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2^1171240 is an apocalyptic number.

1171240 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 1171240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555200).

1171240 is an abundant number, since it is smaller than the sum of its proper divisors (1939160).

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

1171240 is a wasteful number, since it uses less digits than its factorization.

1171240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1171240 is about 1082.2384210515. The cubic root of 1171240 is about 105.4100368868.

Adding to 1171240 its reverse (421711), we get a palindrome (1592951).

The spelling of 1171240 in words is "one million, one hundred seventy-one thousand, two hundred forty".