520542123 has 16 divisors (see below), whose sum is σ = 698544000. Its totient is φ = 344792000.

The previous prime is 520542119. The next prime is 520542131. The reversal of 520542123 is 321245025.

It is a cyclic number.

It is not a de Polignac number, because 520542123 - 2² = 520542119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520542093 and 520542102.

It is not an unprimeable number, because it can be changed into a prime (520542163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495703 + ... + 496751.

It is an arithmetic number, because the mean of its divisors is an integer number (43659000).

Almost surely, 2^520542123 is an apocalyptic number.

520542123 is a deficient number, since it is larger than the sum of its proper divisors (178001877).

520542123 is a wasteful number, since it uses less digits than its factorization.

520542123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 520542123 is about 22815.3922385744. The cubic root of 520542123 is about 804.4245069564.

Adding to 520542123 its reverse (321245025), we get a palindrome (841787148).

The spelling of 520542123 in words is "five hundred twenty million, five hundred forty-two thousand, one hundred twenty-three".