1211040 has 108 divisors (see below), whose sum is σ = 4280094. Its totient is φ = 311808.

The previous prime is 1211039. The next prime is 1211051. The reversal of 1211040 is 401121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 992016 + 219024 = 996^2 + 468^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41746 + ... + 41774.

2^1211040 is an apocalyptic number.

1211040 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 1211040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140047).

1211040 is an abundant number, since it is smaller than the sum of its proper divisors (3069054).

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

1211040 is a wasteful number, since it uses less digits than its factorization.

1211040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1211040 is about 1100.4726257386. The cubic root of 1211040 is about 106.5907445849.

Adding to 1211040 its reverse (401121), we get a palindrome (1612161).

The spelling of 1211040 in words is "one million, two hundred eleven thousand, forty".