1191040 has 32 divisors (see below), whose sum is σ = 2848860. Its totient is φ = 476160.

The previous prime is 1191031. The next prime is 1191061. The reversal of 1191040 is 401911.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 968256 + 222784 = 984^2 + 472^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291 + ... + 1570.

2^1191040 is an apocalyptic number.

1191040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191040 is an abundant number, since it is smaller than the sum of its proper divisors (1657820).

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

1191040 is an equidigital number, since it uses as much as digits as its factorization.

1191040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1191040 is about 1091.3477905782. The cubic root of 1191040 is about 106.0007119924. Note that the first 3 decimals are identical.

Adding to 1191040 its reverse (401911), we get a palindrome (1592951).

The spelling of 1191040 in words is "one million, one hundred ninety-one thousand, forty".