11142257 has 6 divisors (see below), whose sum is σ = 12961458. Its totient is φ = 9550464.

The previous prime is 11142253. The next prime is 11142311. The reversal of 11142257 is 75224111.

It can be written as a sum of positive squares in only one way, i.e., 6964321 + 4177936 = 2639^2 + 2044^2 .

It is not a de Polignac number, because 11142257 - 2² = 11142253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11142251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113648 + ... + 113745.

It is an arithmetic number, because the mean of its divisors is an integer number (2160243).

Almost surely, 2^11142257 is an apocalyptic number.

It is an amenable number.

11142257 is a deficient number, since it is larger than the sum of its proper divisors (1819201).

11142257 is an equidigital number, since it uses as much as digits as its factorization.

11142257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227407 (or 227400 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 11142257 is about 3338.0019472732. The cubic root of 11142257 is about 223.3526230214.

Adding to 11142257 its reverse (75224111), we get a palindrome (86366368).

The spelling of 11142257 in words is "eleven million, one hundred forty-two thousand, two hundred fifty-seven".