1149840 has 60 divisors (see below), whose sum is σ = 3863964. Its totient is φ = 306432.

The previous prime is 1149817. The next prime is 1149857. The reversal of 1149840 is 489411.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 831744 = 564^2 + 912^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79 + ... + 1518.

2^1149840 is an apocalyptic number.

1149840 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 1149840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931982).

1149840 is an abundant number, since it is smaller than the sum of its proper divisors (2714124).

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

1149840 is a wasteful number, since it uses less digits than its factorization.

1149840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1149840 is about 1072.3059264967. The cubic root of 1149840 is about 104.7640962417.

The spelling of 1149840 in words is "one million, one hundred forty-nine thousand, eight hundred forty".