11257287 has 12 divisors (see below), whose sum is σ = 15431976. Its totient is φ = 7299360.

The previous prime is 11257243. The next prime is 11257313. The reversal of 11257287 is 78275211.

11257287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11257287 - 2⁸ = 11257031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11257217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2737 + ... + 5477.

It is an arithmetic number, because the mean of its divisors is an integer number (1285998).

Almost surely, 2^11257287 is an apocalyptic number.

11257287 is a deficient number, since it is larger than the sum of its proper divisors (4174689).

11257287 is an equidigital number, since it uses as much as digits as its factorization.

11257287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818 (or 2781 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 11257287 is about 3355.1880722249. The cubic root of 11257287 is about 224.1186061399.

The spelling of 11257287 in words is "eleven million, two hundred fifty-seven thousand, two hundred eighty-seven".