505401121 has 8 divisors (see below), whose sum is σ = 537168320. Its totient is φ = 474150672.

The previous prime is 505401101. The next prime is 505401131. The reversal of 505401121 is 121104505.

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 505401121 - 2¹¹ = 505399073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505401101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127170 + ... + 131083.

It is an arithmetic number, because the mean of its divisors is an integer number (67146040).

Almost surely, 2^505401121 is an apocalyptic number.

It is an amenable number.

505401121 is a deficient number, since it is larger than the sum of its proper divisors (31767199).

505401121 is a wasteful number, since it uses less digits than its factorization.

505401121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258375.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 505401121 is about 22481.1281078152. The cubic root of 505401121 is about 796.5482117218.

Adding to 505401121 its reverse (121104505), we get a palindrome (626505626).

The spelling of 505401121 in words is "five hundred five million, four hundred one thousand, one hundred twenty-one".