1211140 has 48 divisors (see below), whose sum is σ = 2991744. Its totient is φ = 403200.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211140 is 411121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211141) 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, 5635 + ... + 5845.

It is an arithmetic number, because the mean of its divisors is an integer number (62328).

2^1211140 is an apocalyptic number.

1211140 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 1211140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495872).

1211140 is an abundant number, since it is smaller than the sum of its proper divisors (1780604).

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

1211140 is a wasteful number, since it uses less digits than its factorization.

1211140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1211140 is about 1100.5180598246. The cubic root of 1211140 is about 106.5936783666.

Adding to 1211140 its reverse (411121), we get a palindrome (1622261).

The spelling of 1211140 in words is "one million, two hundred eleven thousand, one hundred forty".