505739121 has 8 divisors (see below), whose sum is σ = 676754304. Its totient is φ = 335941680.

The previous prime is 505739107. The next prime is 505739161. The reversal of 505739121 is 121937505.

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

It is not a de Polignac number, because 505739121 - 2¹¹ = 505737073 is a prime.

It is a super-3 number, since 3×505739121³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (505739161) 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, 303465 + ... + 305126.

It is an arithmetic number, because the mean of its divisors is an integer number (84594288).

Almost surely, 2^505739121 is an apocalyptic number.

It is an amenable number.

505739121 is a deficient number, since it is larger than the sum of its proper divisors (171015183).

505739121 is a wasteful number, since it uses less digits than its factorization.

505739121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608871.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 505739121 is about 22488.6442677188. The cubic root of 505739121 is about 796.7257428536.

The spelling of 505739121 in words is "five hundred five million, seven hundred thirty-nine thousand, one hundred twenty-one".