11281257 has 18 divisors (see below), whose sum is σ = 17647422. Its totient is φ = 6941376.

The previous prime is 11281253. The next prime is 11281267. The reversal of 11281257 is 75218211.

It can be written as a sum of positive squares in 3 ways, for example, as 331776 + 10949481 = 576^2 + 3309^2 .

It is not a de Polignac number, because 11281257 - 2² = 11281253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11281257.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2188 + ... + 5229.

Almost surely, 2^11281257 is an apocalyptic number.

It is an amenable number.

11281257 is a deficient number, since it is larger than the sum of its proper divisors (6366165).

11281257 is a wasteful number, since it uses less digits than its factorization.

11281257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7449 (or 7433 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 11281257 is about 3358.7582526880. The cubic root of 11281257 is about 224.2775643496.

Adding to 11281257 its reverse (75218211), we get a palindrome (86499468).

The spelling of 11281257 in words is "eleven million, two hundred eighty-one thousand, two hundred fifty-seven".