1101440 has 32 divisors (see below), whose sum is σ = 2634660. Its totient is φ = 440320.

The previous prime is 1101439. The next prime is 1101467. The reversal of 1101440 is 441011.

It can be written as a sum of positive squares in 2 ways, for example, as 1098304 + 3136 = 1048^2 + 56^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221 + ... + 1500.

2^1101440 is an apocalyptic number.

1101440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101440 is an abundant number, since it is smaller than the sum of its proper divisors (1533220).

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

1101440 is an equidigital number, since it uses as much as digits as its factorization.

1101440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740 (or 1728 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1101440 is about 1049.4951167109. The cubic root of 1101440 is about 103.2730368544.

Adding to 1101440 its reverse (441011), we get a palindrome (1542451).

The spelling of 1101440 in words is "one million, one hundred one thousand, four hundred forty".