520406123 has 8 divisors (see below), whose sum is σ = 527930208. Its totient is φ = 512892864.

The previous prime is 520406113. The next prime is 520406129. The reversal of 520406123 is 321604025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520406123 - 2⁸ = 520405867 is a prime.

It is a super-2 number, since 2×520406123² = 541645065711782258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520406129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193061 + ... + 195737.

It is an arithmetic number, because the mean of its divisors is an integer number (65991276).

Almost surely, 2^520406123 is an apocalyptic number.

520406123 is a deficient number, since it is larger than the sum of its proper divisors (7524085).

520406123 is a wasteful number, since it uses less digits than its factorization.

520406123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 520406123 is about 22812.4115998287. The cubic root of 520406123 is about 804.3544445752.

The spelling of 520406123 in words is "five hundred twenty million, four hundred six thousand, one hundred twenty-three".