11811258 has 28 divisors (see below), whose sum is σ = 26566458. Its totient is φ = 3936600.

The previous prime is 11811253. The next prime is 11811271. The reversal of 11811258 is 85211811.

It can be written as a sum of positive squares in only one way, i.e., 6036849 + 5774409 = 2457^2 + 2403^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11811253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2593 + ... + 5508.

Almost surely, 2^11811258 is an apocalyptic number.

11811258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11811258 is an abundant number, since it is smaller than the sum of its proper divisors (14755200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11811258 is an frugal number, since it uses more digits than its factorization.

11811258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121 (or 8106 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 11811258 is about 3436.7510820541. The cubic root of 11811258 is about 227.7361907199.

The spelling of 11811258 in words is "eleven million, eight hundred eleven thousand, two hundred fifty-eight".