11256005 has 4 divisors (see below), whose sum is σ = 13507212. Its totient is φ = 9004800.

The previous prime is 11255971. The next prime is 11256019. The reversal of 11256005 is 50065211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6791236 + 4464769 = 2606^2 + 2113^2 .

It is not a de Polignac number, because 11256005 - 2⁶ = 11255941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1125596 + ... + 1125605.

It is an arithmetic number, because the mean of its divisors is an integer number (3376803).

Almost surely, 2^11256005 is an apocalyptic number.

It is an amenable number.

11256005 is a deficient number, since it is larger than the sum of its proper divisors (2251207).

11256005 is an equidigital number, since it uses as much as digits as its factorization.

11256005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251206.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 11256005 is about 3354.9970193727. The cubic root of 11256005 is about 224.1100981409.

Adding to 11256005 its sum of digits (20), we get a square (11256025 = 3355²).

The spelling of 11256005 in words is "eleven million, two hundred fifty-six thousand, five".