504256139 has 4 divisors (see below), whose sum is σ = 504301056. Its totient is φ = 504211224.

The previous prime is 504256121. The next prime is 504256153. The reversal of 504256139 is 931652405.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 504256139 - 2¹² = 504252043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 504256099 and 504256108.

It is not an unprimeable number, because it can be changed into a prime (504256169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10742 + ... + 33524.

It is an arithmetic number, because the mean of its divisors is an integer number (126075264).

Almost surely, 2^504256139 is an apocalyptic number.

504256139 is a deficient number, since it is larger than the sum of its proper divisors (44917).

504256139 is a wasteful number, since it uses less digits than its factorization.

504256139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44916.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 504256139 is about 22455.6482649689. The cubic root of 504256139 is about 795.9462324692.

The spelling of 504256139 in words is "five hundred four million, two hundred fifty-six thousand, one hundred thirty-nine".