11123530 has 48 divisors (see below), whose sum is σ = 22838760. Its totient is φ = 3893120.

The previous prime is 11123527. The next prime is 11123551. The reversal of 11123530 is 3532111.

It can be written as a sum of positive squares in 4 ways, for example, as 6235009 + 4888521 = 2497^2 + 2211^2 .

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 34932 + ... + 35248.

Almost surely, 2^11123530 is an apocalyptic number.

11123530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11123530 is an abundant number, since it is smaller than the sum of its proper divisors (11715230).

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

11123530 is a wasteful number, since it uses less digits than its factorization.

11123530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 11123530 is about 3335.1956464352. The cubic root of 11123530 is about 223.2274218738.

Adding to 11123530 its reverse (3532111), we get a palindrome (14655641).

The spelling of 11123530 in words is "eleven million, one hundred twenty-three thousand, five hundred thirty".