1123500521 has 32 divisors (see below), whose sum is σ = 1347010560. Its totient is φ = 923630400.

The previous prime is 1123500503. The next prime is 1123500557. The reversal of 1123500521 is 1250053211.

It is a happy number.

It is not a de Polignac number, because 1123500521 - 2¹⁴ = 1123484137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123500493 and 1123500502.

It is not an unprimeable number, because it can be changed into a prime (1123508521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2426336 + ... + 2426798.

It is an arithmetic number, because the mean of its divisors is an integer number (42094080).

Almost surely, 2^1123500521 is an apocalyptic number.

1123500521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123500521 is a deficient number, since it is larger than the sum of its proper divisors (223510039).

1123500521 is a wasteful number, since it uses less digits than its factorization.

1123500521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1123500521 is about 33518.6592959802. The cubic root of 1123500521 is about 1039.5796257782.

Adding to 1123500521 its reverse (1250053211), we get a palindrome (2373553732).

It can be divided in two parts, 11 and 23500521, that added together give a palindrome (23500532).

The spelling of 1123500521 in words is "one billion, one hundred twenty-three million, five hundred thousand, five hundred twenty-one".