11220657 has 24 divisors (see below), whose sum is σ = 17882496. Its totient is φ = 6235488.

The previous prime is 11220653. The next prime is 11220673. The reversal of 11220657 is 75602211.

It is not a de Polignac number, because 11220657 - 2² = 11220653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220653) 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 23 ways as a sum of consecutive naturals, for example, 4408 + ... + 6470.

It is an arithmetic number, because the mean of its divisors is an integer number (745104).

Almost surely, 2^11220657 is an apocalyptic number.

It is an amenable number.

11220657 is a deficient number, since it is larger than the sum of its proper divisors (6661839).

11220657 is a wasteful number, since it uses less digits than its factorization.

11220657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 11220657 is about 3349.7249140788. The cubic root of 11220657 is about 223.8752560648.

Adding to 11220657 its reverse (75602211), we get a palindrome (86822868).

The spelling of 11220657 in words is "eleven million, two hundred twenty thousand, six hundred fifty-seven".