1123520256 has 108 divisors (see below), whose sum is σ = 3251243632. Its totient is φ = 373137408.

The previous prime is 1123520239. The next prime is 1123520273. The reversal of 1123520256 is 6520253211.

It is a happy number.

1123520256 is a `hidden beast` number, since 112 + 3 + 520 + 25 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1123520239) and next prime (1123520273).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775725 + ... + 777171.

Almost surely, 2^1123520256 is an apocalyptic number.

1123520256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123520256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625621816).

1123520256 is an abundant number, since it is smaller than the sum of its proper divisors (2127723376).

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

1123520256 is a wasteful number, since it uses less digits than its factorization.

1123520256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1123520256 is about 33518.9536829538. The cubic root of 1123520256 is about 1039.5857127013.

Adding to 1123520256 its reverse (6520253211), we get a palindrome (7643773467).

The spelling of 1123520256 in words is "one billion, one hundred twenty-three million, five hundred twenty thousand, two hundred fifty-six".