501971 has 2 divisors, whose sum is σ = 501972. Its totient is φ = 501970.

The previous prime is 501967. The next prime is 501997. The reversal of 501971 is 179105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501971 - 2² = 501967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (501911) 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, 250985 + 250986.

It is an arithmetic number, because the mean of its divisors is an integer number (250986).

2⁵⁰¹⁹⁷¹ is an apocalyptic number.

501971 is a deficient number, since it is larger than the sum of its proper divisors (1).

501971 is an equidigital number, since it uses as much as digits as its factorization.

501971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 501971 is about 708.4991178541. The cubic root of 501971 is about 79.4742081068.

The spelling of 501971 in words is "five hundred one thousand, nine hundred seventy-one".