505138124 has 24 divisors (see below), whose sum is σ = 931739760. Its totient is φ = 239255744.

The previous prime is 505138079. The next prime is 505138129. The reversal of 505138124 is 421831505.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (505138129) 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, 34934 + ... + 47229.

It is an arithmetic number, because the mean of its divisors is an integer number (38822490).

Almost surely, 2^505138124 is an apocalyptic number.

It is an amenable number.

505138124 is a deficient number, since it is larger than the sum of its proper divisors (426601636).

505138124 is a wasteful number, since it uses less digits than its factorization.

505138124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82249 (or 82247 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 505138124 is about 22475.2780627960. The cubic root of 505138124 is about 796.4100204058.

Adding to 505138124 its reverse (421831505), we get a palindrome (926969629).

The spelling of 505138124 in words is "five hundred five million, one hundred thirty-eight thousand, one hundred twenty-four".