1123012530 has 144 divisors (see below), whose sum is σ = 3113462664. Its totient is φ = 280627200.

The previous prime is 1123012529. The next prime is 1123012543. The reversal of 1123012530 is 352103211.

1123012530 is a `hidden beast` number, since 1 + 123 + 0 + 12 + 530 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 706974921 + 416037609 = 26589^2 + 20397^2 .

It is a super-2 number, since 2×1123012530² = 2522314285074001800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2800330 + ... + 2800730.

Almost surely, 2^1123012530 is an apocalyptic number.

1123012530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123012530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556731332).

1123012530 is an abundant number, since it is smaller than the sum of its proper divisors (1990450134).

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

1123012530 is a wasteful number, since it uses less digits than its factorization.

1123012530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1123012530 is about 33511.3791121762. The cubic root of 1123012530 is about 1039.4290906253.

Adding to 1123012530 its reverse (352103211), we get a palindrome (1475115741).

The spelling of 1123012530 in words is "one billion, one hundred twenty-three million, twelve thousand, five hundred thirty".