620161 has 2 divisors, whose sum is σ = 620162. Its totient is φ = 620160.

The previous prime is 620159. The next prime is 620171. The reversal of 620161 is 161026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518400 + 101761 = 720^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 620161 - 2¹ = 620159 is a prime.

Together with 620159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (620111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310080 + 310081.

It is an arithmetic number, because the mean of its divisors is an integer number (310081).

2⁶²⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

620161 is a deficient number, since it is larger than the sum of its proper divisors (1).

620161 is an equidigital number, since it uses as much as digits as its factorization.

620161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 620161 is about 787.5030158672. The cubic root of 620161 is about 85.2775701083.

Adding to 620161 its reverse (161026), we get a palindrome (781187).

The spelling of 620161 in words is "six hundred twenty thousand, one hundred sixty-one".