11540221 has 8 divisors (see below), whose sum is σ = 14387904. Its totient is φ = 8992320.

The previous prime is 11540203. The next prime is 11540233. The reversal of 11540221 is 12204511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11540221 - 2¹⁹ = 11015933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11540195 and 11540204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11540251) 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 7 ways as a sum of consecutive naturals, for example, 74860 + ... + 75013.

It is an arithmetic number, because the mean of its divisors is an integer number (1798488).

Almost surely, 2^11540221 is an apocalyptic number.

11540221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11540221 is a deficient number, since it is larger than the sum of its proper divisors (2847683).

11540221 is a wasteful number, since it uses less digits than its factorization.

11540221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149891.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 11540221 is about 3397.0900782876. The cubic root of 11540221 is about 225.9807133671.

Adding to 11540221 its reverse (12204511), we get a palindrome (23744732).

The spelling of 11540221 in words is "eleven million, five hundred forty thousand, two hundred twenty-one".