11215740 has 48 divisors (see below), whose sum is σ = 31715712. Its totient is φ = 2961216.

The previous prime is 11215739. The next prime is 11215741. The reversal of 11215740 is 4751211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11215739) and next prime (11215741).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5547 + ... + 7293.

It is an arithmetic number, because the mean of its divisors is an integer number (660744).

Almost surely, 2^11215740 is an apocalyptic number.

11215740 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 11215740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15857856).

11215740 is an abundant number, since it is smaller than the sum of its proper divisors (20499972).

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

11215740 is a wasteful number, since it uses less digits than its factorization.

11215740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11215740 is about 3348.9908927914. The cubic root of 11215740 is about 223.8425498555.

Adding to 11215740 its reverse (4751211), we get a palindrome (15966951).

The spelling of 11215740 in words is "eleven million, two hundred fifteen thousand, seven hundred forty".