11005257 has 4 divisors (see below), whose sum is σ = 14673680. Its totient is φ = 7336836.

The previous prime is 11005231. The next prime is 11005259. The reversal of 11005257 is 75250011.

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 not a de Polignac number, because 11005257 - 2¹⁰ = 11004233 is a prime.

It is a super-2 number, since 2×11005257² = 242231363272098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11005259) 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, 1834207 + ... + 1834212.

It is an arithmetic number, because the mean of its divisors is an integer number (3668420).

Almost surely, 2^11005257 is an apocalyptic number.

It is an amenable number.

11005257 is a deficient number, since it is larger than the sum of its proper divisors (3668423).

11005257 is an equidigital number, since it uses as much as digits as its factorization.

11005257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668422.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 11005257 is about 3317.4172182588. The cubic root of 11005257 is about 222.4334320913.

Adding to 11005257 its reverse (75250011), we get a palindrome (86255268).

The spelling of 11005257 in words is "eleven million, five thousand, two hundred fifty-seven".