11242557 has 10 divisors (see below), whose sum is σ = 16794558. Its totient is φ = 7494984.

The previous prime is 11242549. The next prime is 11242589. The reversal of 11242557 is 75524211.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 93636 = 3339^2 + 306^2 .

It is not a de Polignac number, because 11242557 - 2³ = 11242549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11242557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11242507) 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 9 ways as a sum of consecutive naturals, for example, 69318 + ... + 69479.

Almost surely, 2^11242557 is an apocalyptic number.

It is an amenable number.

11242557 is a deficient number, since it is larger than the sum of its proper divisors (5552001).

11242557 is an equidigital number, since it uses as much as digits as its factorization.

11242557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138809 (or 138800 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 11242557 is about 3352.9922457411. The cubic root of 11242557 is about 224.0208114699.

Adding to 11242557 its reverse (75524211), we get a palindrome (86766768).

The spelling of 11242557 in words is "eleven million, two hundred forty-two thousand, five hundred fifty-seven".