501139 has 2 divisors, whose sum is σ = 501140. Its totient is φ = 501138.

The previous prime is 501133. The next prime is 501157. The reversal of 501139 is 931105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501139 - 2³ = 501131 is a prime.

It is a super-2 number, since 2×501139² = 502280594642, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

501139 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (501131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250569 + 250570.

It is an arithmetic number, because the mean of its divisors is an integer number (250570).

2⁵⁰¹¹³⁹ is an apocalyptic number.

501139 is a deficient number, since it is larger than the sum of its proper divisors (1).

501139 is an equidigital number, since it uses as much as digits as its factorization.

501139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 501139 is about 707.9117176598. The cubic root of 501139 is about 79.4302752191.

It can be divided in two parts, 5011 and 39, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 501139 in words is "five hundred one thousand, one hundred thirty-nine".