11513257 has 4 divisors (see below), whose sum is σ = 13158016. Its totient is φ = 9868500.

The previous prime is 11513239. The next prime is 11513263. The reversal of 11513257 is 75231511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11513257 - 2¹¹ = 11511209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11513287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822369 + ... + 822382.

It is an arithmetic number, because the mean of its divisors is an integer number (3289504).

Almost surely, 2^11513257 is an apocalyptic number.

It is an amenable number.

11513257 is a deficient number, since it is larger than the sum of its proper divisors (1644759).

11513257 is an equidigital number, since it uses as much as digits as its factorization.

11513257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644758.

The product of its digits is 1050, while the sum is 25.

The square root of 11513257 is about 3393.1190665817. The cubic root of 11513257 is about 225.8045730120.

Adding to 11513257 its reverse (75231511), we get a palindrome (86744768).

The spelling of 11513257 in words is "eleven million, five hundred thirteen thousand, two hundred fifty-seven".