1123520445 has 144 divisors (see below), whose sum is σ = 2236695552. Its totient is φ = 520058880.

The previous prime is 1123520441. The next prime is 1123520449. The reversal of 1123520445 is 5440253211.

It is an interprime number because it is at equal distance from previous prime (1123520441) and next prime (1123520449).

It is not a de Polignac number, because 1123520445 - 2² = 1123520441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123520441) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11582637 + ... + 11582733.

It is an arithmetic number, because the mean of its divisors is an integer number (15532608).

Almost surely, 2^1123520445 is an apocalyptic number.

1123520445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123520445 is a deficient number, since it is larger than the sum of its proper divisors (1113175107).

1123520445 is a wasteful number, since it uses less digits than its factorization.

1123520445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1123520445 is about 33518.9565022541. The cubic root of 1123520445 is about 1039.5857709948.

Adding to 1123520445 its reverse (5440253211), we get a palindrome (6563773656).

The spelling of 1123520445 in words is "one billion, one hundred twenty-three million, five hundred twenty thousand, four hundred forty-five".