620001 has 8 divisors (see below), whose sum is σ = 918560. Its totient is φ = 413316.

The previous prime is 619999. The next prime is 620003. The reversal of 620001 is 100026.

620001 = T₈₁ + T₈₂ + ... + T₁₆₁.

It is an interprime number because it is at equal distance from previous prime (619999) and next prime (620003).

It is not a de Polignac number, because 620001 - 2¹ = 619999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620003) 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 in 7 ways as a sum of consecutive naturals, for example, 11455 + ... + 11508.

It is an arithmetic number, because the mean of its divisors is an integer number (114820).

2⁶²⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

620001 is a deficient number, since it is larger than the sum of its proper divisors (298559).

620001 is a wasteful number, since it uses less digits than its factorization.

620001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22972 (or 22966 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 620001 is about 787.4014224016. The cubic root of 620001 is about 85.2702356770.

Adding to 620001 its reverse (100026), we get a palindrome (720027).

It can be divided in two parts, 62000 and 1, that added together give a square (62001 = 249²).

The spelling of 620001 in words is "six hundred twenty thousand, one".