123520523 has 24 divisors (see below), whose sum is σ = 149385600. Its totient is φ = 101727360.

The previous prime is 123520499. The next prime is 123520531. The reversal of 123520523 is 325025321.

It is not a de Polignac number, because 123520523 - 2⁶ = 123520459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123520583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 353753 + ... + 354101.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^123520523 is an apocalyptic number.

123520523 is a deficient number, since it is larger than the sum of its proper divisors (25865077).

123520523 is a wasteful number, since it uses less digits than its factorization.

123520523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 123520523 is about 11113.9787205123. The cubic root of 123520523 is about 498.0195298331.

Adding to 123520523 its reverse (325025321), we get a palindrome (448545844).

The spelling of 123520523 in words is "one hundred twenty-three million, five hundred twenty thousand, five hundred twenty-three".