505401123 has 8 divisors (see below), whose sum is σ = 674561808. Its totient is φ = 336587264.

The previous prime is 505401101. The next prime is 505401131. The reversal of 505401123 is 321104505.

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 505401123 - 2⁸ = 505400867 is a prime.

It is a super-2 number, since 2×505401123² = 510860590259322258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505401123.

It is not an unprimeable number, because it can be changed into a prime (505401623) 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, 83286 + ... + 89147.

It is an arithmetic number, because the mean of its divisors is an integer number (84320226).

Almost surely, 2^505401123 is an apocalyptic number.

505401123 is a deficient number, since it is larger than the sum of its proper divisors (169160685).

505401123 is a wasteful number, since it uses less digits than its factorization.

505401123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173413.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 505401123 is about 22481.1281522970. The cubic root of 505401123 is about 796.5482127726.

Adding to 505401123 its reverse (321104505), we get a palindrome (826505628).

The spelling of 505401123 in words is "five hundred five million, four hundred one thousand, one hundred twenty-three".