1211340 has 48 divisors (see below), whose sum is σ = 3655008. Its totient is φ = 297984.

The previous prime is 1211339. The next prime is 1211381. The reversal of 1211340 is 431121.

1211340 = T₁₁₇ + T₁₁₈ + ... + T₂₀₆.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4 + ... + 1556.

It is an arithmetic number, because the mean of its divisors is an integer number (76146).

2^1211340 is an apocalyptic number.

1211340 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 1211340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827504).

1211340 is an abundant number, since it is smaller than the sum of its proper divisors (2443668).

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

1211340 is a wasteful number, since it uses less digits than its factorization.

1211340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1211340 is about 1100.6089223698. The cubic root of 1211340 is about 106.5995454457.

Adding to 1211340 its reverse (431121), we get a palindrome (1642461).

It can be divided in two parts, 1211 and 340, that added together give a palindrome (1551).

The spelling of 1211340 in words is "one million, two hundred eleven thousand, three hundred forty".