622001 has 4 divisors (see below), whose sum is σ = 623604. Its totient is φ = 620400.

The previous prime is 621997. The next prime is 622009. The reversal of 622001 is 100226.

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 can be written as a sum of positive squares in 2 ways, for example, as 442225 + 179776 = 665^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 622001 - 2² = 621997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 622001.

It is not an unprimeable number, because it can be changed into a prime (622009) 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, 191 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (155901).

2⁶²²⁰⁰¹ is an apocalyptic number.

It is an amenable number.

622001 is a deficient number, since it is larger than the sum of its proper divisors (1603).

622001 is an equidigital number, since it uses as much as digits as its factorization.

622001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 622001 is about 788.6704001039. The cubic root of 622001 is about 85.3618255415.

Adding to 622001 its reverse (100226), we get a palindrome (722227).

The spelling of 622001 in words is "six hundred twenty-two thousand, one".