1123255512 has 80 divisors (see below), whose sum is σ = 3151740240. Its totient is φ = 373754304.

The previous prime is 1123255493. The next prime is 1123255537. The reversal of 1123255512 is 2155523211.

1123255512 is a `hidden beast` number, since 1 + 123 + 25 + 5 + 512 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 480298 + ... + 482630.

It is an arithmetic number, because the mean of its divisors is an integer number (39396753).

Almost surely, 2^1123255512 is an apocalyptic number.

1123255512 is a gapful number since it is divisible by the number (12) 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 1123255512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575870120).

1123255512 is an abundant number, since it is smaller than the sum of its proper divisors (2028484728).

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

1123255512 is a wasteful number, since it uses less digits than its factorization.

1123255512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094 (or 3081 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1123255512 is about 33515.0042816647. The cubic root of 1123255512 is about 1039.5040510077.

Adding to 1123255512 its reverse (2155523211), we get a palindrome (3278778723).

The spelling of 1123255512 in words is "one billion, one hundred twenty-three million, two hundred fifty-five thousand, five hundred twelve".