1141440 has 112 divisors (see below), whose sum is σ = 3840480. Its totient is φ = 286720.

The previous prime is 1141423. The next prime is 1141447. The reversal of 1141440 is 441411.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1141447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27820 + ... + 27860.

It is an arithmetic number, because the mean of its divisors is an integer number (34290).

2^1141440 is an apocalyptic number.

1141440 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 1141440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920240).

1141440 is an abundant number, since it is smaller than the sum of its proper divisors (2699040).

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

1141440 is a wasteful number, since it uses less digits than its factorization.

1141440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1141440 is about 1068.3819541718. The cubic root of 1141440 is about 104.5083591827.

Adding to 1141440 its reverse (441411), we get a palindrome (1582851).

The spelling of 1141440 in words is "one million, one hundred forty-one thousand, four hundred forty".